{"id":85690,"date":"2021-08-12T05:56:26","date_gmt":"2021-08-12T05:56:26","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=85690"},"modified":"2023-03-29T10:11:07","modified_gmt":"2023-03-29T10:11:07","slug":"fix-windows-stop-code-0xc000021a","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/fix-windows-stop-code-0xc000021a\/","title":{"rendered":"Windows Stop Code 0xc000021a [Fixed by Experts]"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p><strong>Table of Contents:<\/strong><\/p><ol type=\"1\">\n<li><a href=\"#First_Pointer\"><strong>What is Stop Code 0xc000021a &amp; how it occurs?<\/strong> <\/a><\/li>\n<li><a href=\"#Second_Pointer\"><strong>How to fix 0xc000021a error code?<\/strong><\/a><\/li>\n<\/ol><p align=\"justify\">Several Windows users&rsquo; have posted queries on Reddit and Microsoft forum related to 0xc000021a stop code. Some said that this error code occurred after a Windows Update installation, while others stated that it appeared out of nowhere while working on their system. And, when they restarted their PC, it got stuck at a booting loop. Users posted their queries with different names for the error such as,<\/p><ul class=\"wp-block-list\">\n<li>Stop code 0xc000021a Reddit<\/li>\n\n\n\n<li>0xc000021a loop<\/li>\n\n\n\n<li>Stop code 0xc000021a after update<\/li>\n\n\n\n<li>0xc000021a windows 10 install<\/li>\n<\/ul><p>Refer to the following users&rsquo; queries from <a href=\"https:\/\/www.reddit.com\/r\/Windows10\/comments\/mdjbqc\/windows_not_booting_after_update_0xc000021a\/\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Reddi<\/a><a href=\"https:\/\/www.reddit.com\/r\/Windows10\/comments\/mdjbqc\/windows_not_booting_after_update_0xc000021a\/\" target=\"_blank\" rel=\"noreferrer noopener\">t<\/a> and <a href=\"https:\/\/answers.microsoft.com\/en-us\/windows\/forum\/all\/windows-10-bsod-error-0xc000021a\/764d25ea-7122-46aa-8acf-9b8de31d6c92\" target=\"_blank\" rel=\"noreferrer noopener nofollow\">Microsoft<\/a>:<\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"722\" height=\"140\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/User-Query.png\" alt=\"queries from Reddit &amp; Microsoft\" class=\"wp-image-85722 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/User-Query.png 722w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/User-Query-300x58.png 300w\" sizes=\"auto, (max-width: 722px) 100vw, 722px\" \/><\/figure><p align=\"justify\"><strong>&ldquo;<\/strong>My Windows 10 Pro PC stopped booting two days ago. It goes into the repair\/diagnosing loop and has an error code 0xc000021a. I went through all the advanced options to repair it and to disable the blue screen. I am aware of some troubleshooting, which I have tried, but cannot fix. This error has got me worried. Could anyone tell how to fix it?<strong>&rdquo;<\/strong><\/p><p>Well, circumstances could be different, but the problem remains the same. So, how would you fix it?<\/p><p align=\"justify\">Worry not! You can fix it by attempting the methods shared in this blog. However, before that, let&rsquo;s first understand this error and its causes.<\/p><h2 id=\"what-is-stop-code-0xc000021a-&amp;-how-it-occurs?\">What is Stop Code 0xc000021a &amp; how it occurs?<\/h2><p align=\"justify\">The stop code 0xc000021a represents the WINLOGON_FATAL_ERROR, which occurs when a user-mode subsystem, such as WinLogon or Client Server Run-Time Subsystem (CSRSS), is compromised. It additionally means that security can&rsquo;t be guaranteed for your system due to this error. And in turn, the Windows Operating System (OS) switches to the kernel-mode, showing a blue screen.<\/p><p align=\"justify\">Sometimes, when you restore your hard disk from a backup, the system files can be corrupted or faulty and may cause this error on your system. Other causes behind the 0xc000021a error may include a corrupted hard drive, faulty device drivers, incompatible software\/app installed, and problematic Windows update.<\/p><p align=\"justify\">Irrespective of the reasons, you can fix it. We&rsquo;ve collated the best possible methods to help you get rid of <a href=\"https:\/\/www.stellarinfo.com\/blog\/fix-critical-process-died-bsod-error\/\" target=\"_blank\" rel=\"noopener\">such blue screen errors<\/a>. You can attempt the below-discussed methods by following them step-by-step.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Caution<\/strong>: <em>Some of the given methods may cause data loss. Therefore, we suggest you take backup of your system data and then troubleshoot the problem.<\/em><\/td><\/tr><\/tbody><\/table><\/figure><h2 class=\"wp-block-heading\" id=\"how-to-fix-the-0xc000021a-error-code?\">How to fix the 0xc000021a error code?<\/h2><ol class=\"wp-block-list\" type=\"1\">\n<li>Run SFC Tool<\/li>\n\n\n\n<li>Run Windows Defender Antivirus Tool<\/li>\n\n\n\n<li>Update\/Uninstall Device Driver<\/li>\n\n\n\n<li>Uninstall Problematic Windows Update<\/li>\n\n\n\n<li>Run CHKDSK Command<\/li>\n\n\n\n<li>Uninstall Incompatible Software\/Application<\/li>\n\n\n\n<li>Perform System Restore<\/li>\n<\/ol><p>Consider booting your PC into safe mode to prevent any element from causing trouble while you&rsquo;re trying to fix a <a href=\"https:\/\/www.stellarinfo.com\/article\/critical-structure-corruption-windows-10.php\" target=\"_blank\" rel=\"noreferrer noopener\">BSOD error<\/a>.<\/p><p><strong>To enter Safe Mode, follow the given steps:<\/strong><\/p><ol class=\"wp-block-list\" type=\"a\">\n<li>Restart your system; as soon as you see the Windows logo on the screen, reboot it again and repeat this step thrice.<\/li>\n\n\n\n<li>After that, you&rsquo;d reach the Automatic Repair environment.<\/li>\n\n\n\n<li>There, click &lsquo;<strong>Advanced options&rsquo;<\/strong>, leading you to the &lsquo;<strong>Choose an option&rsquo;<\/strong> screen.<\/li>\n\n\n\n<li>There, click <strong>Troubleshoot &gt; Advanced options &gt; Startup Settings &gt; Restart<\/strong>.<\/li>\n\n\n\n<li>Once your system gets restarted, click <strong>F4<\/strong> to enable Safe Boot.<\/li>\n<\/ol><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"980\" height=\"490\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Windows-stop-code-image-image1.jpg\" alt=\"windows stop code\" class=\"wp-image-85723 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Windows-stop-code-image-image1.jpg 980w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Windows-stop-code-image-image1-300x150.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Windows-stop-code-image-image1-768x384.jpg 768w\" sizes=\"auto, (max-width: 980px) 100vw, 980px\" \/><\/figure><p>Now that you&rsquo;re booted into safe mode, you can proceed with performing troubleshooting methods.<\/p><h3>Method 1: Run SFC Utility<\/h3><ul class=\"wp-block-list\" type=\"a\">\n<li>Press <strong>Windows + R<\/strong> to open the <strong>Run<\/strong> dialog box.<\/li>\n\n\n\n<li>Open Command Prompt and choose to run it as administrator.<\/li>\n\n\n\n<li>Then type the following command and press <strong>Enter<\/strong>.<\/li>\n<\/ul><p><em>DISM.exe \/Online \/Cleanup-image \/Restorehealth<\/em><\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"597\" height=\"309\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-dism-command-image3-1.jpg\" alt=\"Run SFC Utility\" class=\"wp-image-85727 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-dism-command-image3-1.jpg 597w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-dism-command-image3-1-300x155.jpg 300w\" sizes=\"auto, (max-width: 597px) 100vw, 597px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Now, wait for a while as it may take some time to show system files that need to be fixed.<\/li>\n\n\n\n<li>Next, type <strong>SFC\/scannow<\/strong> command and hit <strong>Enter<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"481\" height=\"161\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-sfc-scan-command-image4-1.jpg\" alt=\"Run SFC scan\" class=\"wp-image-85728 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-sfc-scan-command-image4-1.jpg 481w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-sfc-scan-command-image4-1-300x100.jpg 300w\" sizes=\"auto, (max-width: 481px) 100vw, 481px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Let the process complete. Once done, close the window and try rebooting your system to check if the error is gone.<\/li>\n<\/ul><h3>Method 2: Run Windows Defender Antivirus Tool<\/h3><ul class=\"wp-block-list\" type=\"a\">\n<li>Open <strong>System Settings<\/strong> and go to <strong>Update &amp; Security &gt; Windows Security &gt; Virus &amp; threat protection<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"625\" height=\"494\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/go-to-Windows-security-and-then-to-virus-and-threat-protection-image5.jpg\" alt=\"Windows Security\" class=\"wp-image-85729 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/go-to-Windows-security-and-then-to-virus-and-threat-protection-image5.jpg 625w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/go-to-Windows-security-and-then-to-virus-and-threat-protection-image5-300x237.jpg 300w\" sizes=\"auto, (max-width: 625px) 100vw, 625px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>The Windows built-in Windows Defender antivirus program will start scanning the PC for any viruses. If there&rsquo;s a malware present on your system, it will show up in the results.<\/li>\n\n\n\n<li>Next, follow the instructions given on the screen to fix the windows stop code 0xc000021a. After completion, reboot your system and check if the problem is solved.<\/li>\n<\/ul><h3>Method 3: Update\/Uninstall Device Driver<\/h3><ul class=\"wp-block-list\" type=\"a\">\n<li>Press <strong>Windows + X<\/strong>, click <strong>Device Manager<\/strong> and then navigate to the device category where you want to update the drivers.<\/li>\n\n\n\n<li>Expand the device category and right-click on the driver. Choose <strong>Update driver<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"434\" height=\"372\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/update-driver-image6.jpg\" alt=\"Update Driver\" class=\"wp-image-85730 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/update-driver-image6.jpg 434w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/update-driver-image6-300x257.jpg 300w\" sizes=\"auto, (max-width: 434px) 100vw, 434px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Next, choose to <strong>&lsquo;Search automatically for updated driver software.&rsquo;<\/strong><\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"650\" height=\"337\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/search-automatically-for-latest-driver-software-image7.jpg\" alt=\"Search Automatically for Updated driver software\" class=\"wp-image-85731 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/search-automatically-for-latest-driver-software-image7.jpg 650w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/search-automatically-for-latest-driver-software-image7-300x156.jpg 300w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Let Windows look for the latest driver software available.<\/li>\n<\/ul><p><strong>If you already have the latest driver, try uninstalling it and then re-installing it with the compatible one.<\/strong><\/p><ul class=\"wp-block-list\" type=\"a\">\n<li>Go to the device driver, which seems to be causing the issue, and right-click on it.<\/li>\n<\/ul><p>Choose Uninstall device.<\/p><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"448\" height=\"393\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/uninstall-device-image8.jpg\" alt=\"Uninstall Device\" class=\"wp-image-85732 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/uninstall-device-image8.jpg 448w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/uninstall-device-image8-300x263.jpg 300w\" sizes=\"auto, (max-width: 448px) 100vw, 448px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>On the next prompt, click &lsquo;<strong>Delete the driver software for this device<\/strong>&rsquo; and click <strong>Uninstall<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"337\" height=\"226\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Delete-the-driver-software-for-this-device-image8.jpg\" alt=\"Delete the Driver Software\" class=\"wp-image-85733 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Delete-the-driver-software-for-this-device-image8.jpg 337w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/Delete-the-driver-software-for-this-device-image8-300x201.jpg 300w\" sizes=\"auto, (max-width: 337px) 100vw, 337px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Wait and let the process end. Now, close the window and check if the error is gone. Afterward, you can download the compatible device driver by visiting their manufacturer&rsquo;s site.<\/li>\n<\/ul><h3>Method 4: Uninstall Problematic Windows Update<\/h3><ul class=\"wp-block-list\" type=\"a\">\n<li>Go to <strong>System Settings &gt; Update &amp; security &gt; Windows Update &gt; View Update History<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"600\" height=\"387\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/view-update-history-image9.jpg\" alt=\"View Update History\" class=\"wp-image-85735 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/view-update-history-image9.jpg 600w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/view-update-history-image9-300x194.jpg 300w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Next, click <strong>Uninstall updates<\/strong> and choose the update you recently installed, causing issues for your system. Finally, right-click on the update and click <strong>Uninstall<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"893\" height=\"560\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/right-click-on-the-Windows-update-and-click-Uninstall-image9.jpg\" alt=\"Uninstall Update\" class=\"wp-image-85738 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/right-click-on-the-Windows-update-and-click-Uninstall-image9.jpg 893w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/right-click-on-the-Windows-update-and-click-Uninstall-image9-300x188.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/right-click-on-the-Windows-update-and-click-Uninstall-image9-768x482.jpg 768w\" sizes=\"auto, (max-width: 893px) 100vw, 893px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Click &lsquo;<strong>Yes&rsquo;<\/strong> if the process asks for permission. Let the process end, and then reboot your PC.<\/li>\n<\/ul><h3>Method 5: Run CHKDSK Command<\/h3><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Caution<\/strong>: While performing the CHKSK command, you may end up losing data as it doesn&rsquo;t read and store data from the bad sectors of the hard drive. We recommend you take backup of your system or recover your data with a <a href=\"https:\/\/www.stellarinfo.com\/windows-data-recovery-professional.php\" target=\"_blank\" rel=\"noreferrer noopener\">powerful data recovery software<\/a>.<\/td><\/tr><\/tbody><\/table><\/figure><p>To run the CHKDSK command, follow the given steps:<\/p><ul class=\"wp-block-list\" type=\"a\">\n<li>Run Command Prompt as administrator, type <strong>chkdsk \/f \/r D: <\/strong>in the open window, and press <strong>Enter<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"658\" height=\"609\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-chkdsk-command-image10.jpg\" alt=\"Run CHKDSK Command\" class=\"wp-image-85739 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-chkdsk-command-image10.jpg 658w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/run-chkdsk-command-image10-300x278.jpg 300w\" sizes=\"auto, (max-width: 658px) 100vw, 658px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>The command will scan and mark the bad sectors on the hard drive and fix the drive corruption.<\/li>\n\n\n\n<li>Once the process finishes, close the window, and restart your system.<\/li>\n<\/ul><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Also Read: <a href=\"https:\/\/www.stellarinfo.com\/blog\/running-chkdsk-on-windows-10-may-damage-ssd-and-cause-blue-screens\/\" target=\"_blank\" rel=\"noreferrer noopener\">Running CHKDSK May Affect Your SSD and Cause Blue Screen<\/a><\/strong><\/td><\/tr><\/tbody><\/table><\/figure><h3>Method 6: Uninstall Incompatible Software\/Application<\/h3><ul class=\"wp-block-list\" type=\"a\">\n<li>Go to <strong>System Settings &gt; Apps &gt; Apps &amp; features<\/strong>.<\/li>\n\n\n\n<li>Select the application which seems to be causing the error on your system, click on it, and select <strong>Uninstall<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"515\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/select-the-application-and-click-uninstall-image11.jpg\" alt=\"Apps and Features\" class=\"wp-image-85741 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/select-the-application-and-click-uninstall-image11.jpg 624w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/select-the-application-and-click-uninstall-image11-300x248.jpg 300w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Wait until the process is completed. Once done, reboot the PC to see if the error persists.<\/li>\n<\/ul><h3>Method 7: Perform System Restore<\/h3><p>If the above methods don&rsquo;t fix the stop code 0xc000021a, you can try performing System Restore. However, it brings the system to default or chosen restore point.<\/p><p align=\"justify\">Therefore, backup your system data or in case of data loss, restore it using a reliable data recovery software, such as <strong><a href=\"https:\/\/www.stellarinfo.com\/windows-data-recovery-professional.php\" target=\"_blank\" rel=\"noreferrer noopener\">Stellar Data Recovery Professional<\/a><\/strong><a href=\"https:\/\/www.stellarinfo.com\/windows-data-recovery-professional.php\"><strong>.<\/strong><\/a> It is a DIY tool that lets you recover data from formatted, corrupted, unbootable, crashed, or BSOD-affected Windows systems and storage devices, such as HDDs, SSDs, USB drives, etc.<\/p><p>Once you&rsquo;re done with backing up or recovering your data, proceed with the following steps:<\/p><ul class=\"wp-block-list\" type=\"a\">\n<li>Type <strong>Create a restore point<\/strong> in the Windows search box.<\/li>\n\n\n\n<li>Next, under the <strong>System Protection<\/strong> tab, go to <strong>System Restore<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"412\" height=\"468\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/click-system-restore-under-system-protection-image12.jpg\" alt=\"System Protection\" class=\"wp-image-85742 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/click-system-restore-under-system-protection-image12.jpg 412w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/click-system-restore-under-system-protection-image12-264x300.jpg 264w\" sizes=\"auto, (max-width: 412px) 100vw, 412px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>Click <strong>Next &gt; Next<\/strong>. Choose a restore point and click <strong>Scan for affected programs<\/strong>.<\/li>\n<\/ul><figure class=\"wp-block-image size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"566\" height=\"459\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/scan-for-affected-programs-image13.jpg\" alt=\"Scan for Affected Programs\" class=\"wp-image-85743 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/scan-for-affected-programs-image13.jpg 566w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2021\/08\/scan-for-affected-programs-image13-300x243.jpg 300w\" sizes=\"auto, (max-width: 566px) 100vw, 566px\" \/><\/figure><ul class=\"wp-block-list\">\n<li>It will scan for the programs and files that will be affected during the process.<\/li>\n\n\n\n<li>Wait until the process ends. Close the window and then reboot your PC.<\/li>\n<\/ul><p align=\"justify\">Encountering a blue screen error with a stop code 0xc000021a error randomly, could be quite annoying. To tackle such BSOD errors, you can try out the DIY methods given in this blog, including running SFC utility, CHKDSK command, Windows Defender program, uninstalling a problematic Windows update or software, or performing System Restore. But be aware that methods such as running CHKDSK and System Restore may cause data loss. So, take a backup of your system data before performing these methods or restore it using reliable data recovery software.<\/p><p>If you&rsquo;ve encountered any other BSOD error on your Windows PC, let us know in the comment section below!<\/p><p><strong>Also Read: <\/strong><a href=\"https:\/\/www.stellarinfo.com\/blog\/fix-error-code-0xc0000225-in-windows\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>How to Fix the Error Code 0xc0000225?<\/strong><\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Table of Contents: What is Stop Code 0xc000021a &amp; how it occurs?&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/fix-windows-stop-code-0xc000021a\/\">Continue reading <span class=\"screen-reader-text\">Windows Stop Code 0xc000021a [Fixed by Experts]<\/span><\/a><\/p>\n","protected":false},"author":37,"featured_media":85744,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[701],"tags":[],"class_list":["post-85690","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows-data-recovery-professional","entry"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v26.9 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Fixed: Windows Stop Code 0xc000021a Error<\/title>\n<meta name=\"description\" content=\"Read this blog to know-how to easily get rid of the BSOD Error 0xc000021a on a Windows 10 computer.\" \/>\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.stellarinfo.com\/blog\/fix-windows-stop-code-0xc000021a\/\" \/>\n<meta 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