{"id":1937,"date":"2020-10-30T10:15:22","date_gmt":"2020-10-30T10:15:22","guid":{"rendered":"https:\/\/www.arysontechnologies.com\/blog\/?p=1937"},"modified":"2026-04-08T13:22:01","modified_gmt":"2026-04-08T13:22:01","slug":"fix-outlook-crashes-closes-unexpectedly","status":"publish","type":"post","link":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/","title":{"rendered":"Outlook Crashes or Closes Unexpectedly? Here\u2019s How to Fix It"},"content":{"rendered":"<p class=\"block_sum\"><em>Outlook users very often face Outlook error 0x80070021 when they try to copy or back up the Outlook.pst file to another location. If users do not resolve this issue, they might face difficulty accessing their emails, contacts, and calendar data, or risk permanent data loss. This blog explains common causes and manual troubleshooting methods to fix Outlook error 0x80070021. Along with that, here you will learn how to use the <a href=\"https:\/\/www.arysontechnologies.com\/outlook-pst-repair.html?\"><strong>Aryson Outlook PST Repair Tool<\/strong><\/a> to repair the corrupted PST files.<\/em><span class=\"block_btn\"><a class=\"custom-download-btn\" href=\"https:\/\/www.arysontechnologies.com\/demo-version\/aryson-outlook-recovery.exe\" rel=\"nofollow\"> Download Now<\/a>&nbsp;&nbsp;<a class=\"custom-buy-btn\" href=\"https:\/\/www.arysontechnologies.com\/outlook-recovery\/order-now.html\" rel=\"nofollow\"> Purchase Now<\/a><\/span><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_83 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 eztoc-toggle-hide-by-default' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Symptoms_of_Outlook_PST_Backup_Error\" >Symptoms of Outlook PST Backup Error<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#What_Causes_Outlook_Error_0x80070021\" >What Causes Outlook Error 0x80070021?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#How_to_Fix_Outlook_Error_0x80070021\" >How to Fix Outlook Error 0x80070021?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Fix_1_End_all_the_Outlook_Background_Processes_via_Task_Manager\" >Fix 1: End all the Outlook Background Processes via Task Manager<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Steps_to_Fix_Outlook_PST_File_Error\" >Steps to Fix Outlook PST File Error<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Fix_2_Perform_a_Clean_Boot_to_Eliminate_Software_Conflicts\" >Fix 2: Perform a Clean Boot to Eliminate Software Conflicts<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Simple_Steps_to_Perform_a_Clean_Boot\" >Simple Steps to Perform a Clean Boot<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Fix_3_Advanced_Software_to_Fix_Outlook_Error_0x80070021\" >Fix 3: Advanced Software to Fix Outlook Error 0x80070021<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Quick_Steps_to_Repair_the_Corrupted_PST_Files\" >Quick Steps to Repair the Corrupted PST Files&nbsp;<\/a><\/li><\/ul><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#Conclusion\" >Conclusion<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#FAQs\" >FAQs<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Symptoms_of_Outlook_PST_Backup_Error\"><\/span>Symptoms of Outlook PST Backup Error<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Regular Microsoft Outlook users &amp; businesses get to know about this issue when they face any of the following symptoms listed below.&nbsp;<\/p>\n<ul>\n<li>They might see an <strong>error message 0x80070021<\/strong> when trying to copy or back up the PST.<\/li>\n<li>For some, the PST file becomes <strong>completely inaccessible<\/strong> or locked.&nbsp;<\/li>\n<li>Users might be <strong>unable to send or receive emails<\/strong> due to Outlook&rsquo;s unresponsiveness.<\/li>\n<li>Moreover, an <strong>incomplete backup of PST files<\/strong> might stop midway.&nbsp;<\/li>\n<li>Outlook might <strong>fail to launch properly<\/strong> or <strong>freeze <\/strong>whenever the PST file is locked or in use.<\/li>\n<li>Users might notice <strong>missing emails, contacts, or calendar items<\/strong> due to an underlying PST file corruption.<\/li>\n<\/ul>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"What_Causes_Outlook_Error_0x80070021\"><\/span>What Causes Outlook Error 0x80070021?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>But a question might be residing in your mind, why are you even facing this error in the first place? Read the causes listed below to get your answers.<\/p>\n<ul>\n<li>The PST file might be <strong>actively locked<\/strong> or used by another application.&nbsp;<\/li>\n<li>Antivirus <strong>programs, sync tools, or backup software<\/strong> running simultaneously.&nbsp;<\/li>\n<li><strong>Windows Search indexing<\/strong> the PST file in the background might cause access conflicts.<\/li>\n<li><strong>Abnormal or forced termination<\/strong> of the Outlook program while it is running.<\/li>\n<li>Third-party applications like <strong>Lync or Skype<\/strong> for Business might hold access to the PST.<\/li>\n<li>The Outlook PST file <strong>exceeding the standard size limit<\/strong> might also cause an error.<\/li>\n<\/ul>\n<p>Now, from the above causes, identify the reason you are facing error 0x80070021 Outlook. Refer to the upcoming fixes &amp; choose a suitable method to resolve the issue as per the cause.<\/p>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"How_to_Fix_Outlook_Error_0x80070021\"><\/span>How to Fix Outlook Error 0x80070021?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>As we have discussed the pre-migration details of the error, let us move on to the actual recovery process to eliminate the issue and proceed with the important tasks.<\/p>\n<ul>\n<li>Close All Outlook Background Processes via Task Manager<\/li>\n<li>Perform a Clean Boot to Eliminate Software Conflicts<\/li>\n<li>Advanced Software to Fix Outlook Error 0x80070021<\/li>\n<\/ul>\n<p>Read through each of these methods carefully and try them as per the cause of the problem. In case the manual troubleshooting does not help you, it is better to use the automated software mentioned below for the same.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Fix_1_End_all_the_Outlook_Background_Processes_via_Task_Manager\"><\/span>Fix 1: End all the Outlook Background Processes via Task Manager<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>You can open the Task Manager to check out the currently running background processes of Outlook. Just right-click on the tasks and choose the &ldquo;<strong>End Task<\/strong>&rdquo; option to close them. So, even after Outlook appears to be closed, it might be active in the background. This keeps the PST files locked and prevents any copy of the backup operation from taking place successfully. To avoid this kind of issue, follow the steps below and close the background tasks.&nbsp;<\/p>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Steps_to_Fix_Outlook_PST_File_Error\"><\/span>Steps to Fix Outlook PST File Error<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li><strong>Close Outlook<\/strong> &amp; press <strong>Ctrl + Alt + Del<\/strong> on your keyboard to open the options screen.<\/li>\n<li>Click on <strong>Task Manager<\/strong> &amp; select the <strong>More Details<\/strong> option to expand the full view.<\/li>\n<li><strong>Under the Processes <\/strong>tab, <strong>sort <\/strong>the list by names &amp; <strong>Locate all Outlook-related processes<\/strong>.<\/li>\n<li>Select each Outlook process <strong>one by one<\/strong> &amp; click the <strong>End Task<\/strong> button to terminate it.<\/li>\n<li>Also <strong>check for Lync &amp; Skype<\/strong> for Business processes &amp; <strong>close them<\/strong> using End Task.<\/li>\n<li><strong>Disable your antivirus program<\/strong> if it is actively running a scan.<\/li>\n<li>At last, try to <strong>copy or back up the PST file<\/strong> to verify whether the error is resolved.<\/li>\n<\/ol>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Fix_2_Perform_a_Clean_Boot_to_Eliminate_Software_Conflicts\"><\/span>Fix 2: Perform a Clean Boot to Eliminate Software Conflicts<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In a <strong>Clean Boot<\/strong>, Windows starts in normal mode but without non-essential third-party background applications or services loaded at startup. This method helps users to isolate software conflicts that might be locking the PST file &amp; stopping a successful backup operation from getting complete on your system.<\/p>\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Simple_Steps_to_Perform_a_Clean_Boot\"><\/span>Simple Steps to Perform a Clean Boot<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ol>\n<li>Press <strong>Windows + R<\/strong>, type msconfig in the Run dialog box, and click OK.<\/li>\n<li>Click the <strong>Selective Startup<\/strong> option on the <strong>General <\/strong>tab and <strong>uncheck the Load Startup Items checkbox.<\/strong><\/li>\n<li>Navigate to the <strong>Services <\/strong>tab and check the <strong>Hide all Microsoft services<\/strong> checkbox.<\/li>\n<li>Click <strong>Disable All<\/strong> to deselect all third-party services, then click <strong>Apply <\/strong>and <strong>OK<\/strong>.<\/li>\n<li>Click <strong>Restart <\/strong>on the dialog box that appears to reboot the system in Clean Boot state.<\/li>\n<li>After restarting, <strong>attempt to copy or back up<\/strong> the Outlook PST file to your desired location.<\/li>\n<li>If the error is resolved, <strong>restore your original startup configuration<\/strong> via msconfig after copying.<\/li>\n<\/ol>\n<div class=\"user-query mb-3\">\n<h3 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Fix_3_Advanced_Software_to_Fix_Outlook_Error_0x80070021\"><\/span>Fix 3: Advanced Software to Fix Outlook Error 0x80070021<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p><strong>Aryson Outlook PST Repair Software<\/strong> is an expert-recommended software that helps businesses <strong>repair corrupted PST files<\/strong> &amp; resolve Outlook error 0x80070021 efficiently. Many organisations solely rely on this software to recover their <strong>bulk of important damaged<\/strong> <strong>data <\/strong>in one go. Moreover, the utility can recover <strong>emails, contacts, calendars, attachments, notes, and tasks<\/strong> with complete accuracy. Additionally, it allows users to scan their data according to different levels of corruption, i.e., in <strong>Standard, Advanced, or Deep Scan modes<\/strong>. On top of that, this all-in-one solution can also <a title=\"recover Outlook data PST\" href=\"https:\/\/www.arysontechnologies.com\/updates\/repair-corrupt-outlook-data-files\/\" target=\"_blank\" rel=\"noopener\">recover Outlook data<\/a>. Also, the <strong>advanced scanning modes<\/strong> and a <strong>built-in preview<\/strong> option are the reasons administrators choose this software.&nbsp;<\/p>\n<h4 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Quick_Steps_to_Repair_the_Corrupted_PST_Files\"><\/span>Quick Steps to Repair the Corrupted PST Files&nbsp;<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ol>\n<li>Firstly, download &amp; run the <strong>Aryson Outlook PST Repair Software<\/strong> on your system.<\/li>\n<li>After that, <strong>load <\/strong>the required corrupt PST files into the software.&nbsp;<\/li>\n<li>Now, choose <strong>Standard, Advanced, or Deep Scan<\/strong> recovery modes as per the corruption.<\/li>\n<li>Modify the <strong>required settings <\/strong>as needed &amp; click <strong>OK <\/strong>to begin the scan process.<\/li>\n<li>Next, <strong>select the required PST file<\/strong> items &amp; <strong>preview <\/strong>them after the scanning is complete.<\/li>\n<li><strong>Save the recovered data<\/strong> in PST or any other <strong>preferred format<\/strong> as required.<\/li>\n<li>At last, click <strong>OK <\/strong>and save the recovered Outlook data to your desired location.<\/li>\n<\/ol>\n<\/div>\n<h2 class=\"main_heading\"><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In this blog, we discussed the possible reasons for Outlook error 0x80070021 and explored various manual troubleshooting methods to fix Outlook error 0x80070021. Along with that, we learnt how to use the automated software to repair corrupted PST files without any data loss. In case you face any issues when you use the software, contact our tech support team for personalized assistance.<\/p>\n<h2 class=\"faq-main_heading\"><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n<div class=\"schema-faq wp-block-yoast-faq-block\"><div class=\"schema-faq-section\" id=\"faq-question-1775654417392\"><strong class=\"schema-faq-question\"><strong>Q1. What is Outlook error 0x80070021?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans-<\/strong> Outlook PST locked error occurs when another process has locked a portion of the PST file, preventing you from copying or backing it up to another location.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775654440508\"><strong class=\"schema-faq-question\"><strong>Q2. Why does error 0x80070021 occur during PST backup?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans- <\/strong>The error occurs because Outlook or another background application, such as antivirus, Skype, or Lync, is actively locking the PST file during the backup operation.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775654457314\"><strong class=\"schema-faq-question\"><strong>Q3. Can I fix Outlook error 0x80070021 without third-party software?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans-<\/strong> Yes, you can use Task Manager to close background processes, perform a Clean Boot, or use System Restore to resolve the error. However, using the Aryson Outlook PST Repair Tool is considered more secure.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775654476930\"><strong class=\"schema-faq-question\"><strong>Q4. Will my PST data be lost after fixing error 0x80070021?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans- <\/strong>No. The manual methods discussed above do not delete or modify PST data. The Aryson PST Repair Tool also recovers and saves all data without any loss.<\/p> <\/div> <div class=\"schema-faq-section\" id=\"faq-question-1775654493585\"><strong class=\"schema-faq-question\"><strong>Q5. What should I do if none of the manual methods resolve error 0x80070021?\u00a0<\/strong><\/strong> <p class=\"schema-faq-answer\"><strong>Ans-<\/strong> If manual methods fail, your PST file may be corrupted. Use the Aryson Outlook PST Repair Software to scan, repair, and recover all data from the corrupted PST file.<\/p> <\/div> <\/div>\n\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-bottom\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;1937&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;bottom&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;1&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;5&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;5\\\/5 - (1 vote)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Outlook Crashes or Closes Unexpectedly? Here\u2019s How to Fix It&quot;,&quot;width&quot;:&quot;142.5&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 142.5px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            5\/5 - (1 vote)    <\/div>\n    <\/div>\n","protected":false},"excerpt":{"rendered":"<p>Outlook users very often face Outlook error 0x80070021 when they try to copy or back up the Outlook.pst file to<a class=\"read-more ml-1 main-read-more\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/\">Read More<\/a><\/p>\n","protected":false},"author":12,"featured_media":1945,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[139],"tags":[],"class_list":["post-1937","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-outlook"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.6 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Outlook Crashes or Closes Unexpectedly? Here\u2019s How to Fix It<\/title>\n<meta name=\"description\" content=\"Explore methods to fix the Outlook crashes or closes unexpectedly error. Find the best solutions to resolve Outlook crashing issues easily.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Outlook Crashes or Closes Unexpectedly? Here\u2019s How to Fix It\" \/>\n<meta property=\"og:description\" content=\"Explore methods to fix the Outlook crashes or closes unexpectedly error. 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With a meticulous, reader-first approach, I break down complex technical processes into simple, actionable content - helping IT professionals and decision-makers tackle challenges efficiently.","sameAs":["https:\/\/in.linkedin.com\/in\/harshita-sachdeva-028156292"],"url":"https:\/\/www.arysontechnologies.com\/blog\/author\/harshita\/"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654417392","position":1,"url":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654417392","name":"Q1. What is Outlook error 0x80070021?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans-<\/strong> Outlook PST locked error occurs when another process has locked a portion of the PST file, preventing you from copying or backing it up to another location.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654440508","position":2,"url":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654440508","name":"Q2. Why does error 0x80070021 occur during PST backup?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans- <\/strong>The error occurs because Outlook or another background application, such as antivirus, Skype, or Lync, is actively locking the PST file during the backup operation.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654457314","position":3,"url":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654457314","name":"Q3. Can I fix Outlook error 0x80070021 without third-party software?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans-<\/strong> Yes, you can use Task Manager to close background processes, perform a Clean Boot, or use System Restore to resolve the error. However, using the Aryson Outlook PST Repair Tool is considered more secure.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654476930","position":4,"url":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654476930","name":"Q4. Will my PST data be lost after fixing error 0x80070021?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans- <\/strong>No. The manual methods discussed above do not delete or modify PST data. The Aryson PST Repair Tool also recovers and saves all data without any loss.","inLanguage":"en-US"},"inLanguage":"en-US"},{"@type":"Question","@id":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654493585","position":5,"url":"https:\/\/www.arysontechnologies.com\/blog\/fix-outlook-crashes-closes-unexpectedly\/#faq-question-1775654493585","name":"Q5. What should I do if none of the manual methods resolve error 0x80070021?\u00a0","answerCount":1,"acceptedAnswer":{"@type":"Answer","text":"<strong>Ans-<\/strong> If manual methods fail, your PST file may be corrupted. Use the Aryson Outlook PST Repair Software to scan, repair, and recover all data from the corrupted PST file.","inLanguage":"en-US"},"inLanguage":"en-US"}]}},"_links":{"self":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/1937","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/comments?post=1937"}],"version-history":[{"count":4,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/1937\/revisions"}],"predecessor-version":[{"id":5872,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/posts\/1937\/revisions\/5872"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/media\/1945"}],"wp:attachment":[{"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/media?parent=1937"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/categories?post=1937"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.arysontechnologies.com\/blog\/wp-json\/wp\/v2\/tags?post=1937"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}