{"id":160773,"date":"2024-01-24T09:16:24","date_gmt":"2024-01-24T09:16:24","guid":{"rendered":"https:\/\/www.stellarinfo.com\/blog\/?p=160773"},"modified":"2025-08-06T08:33:41","modified_gmt":"2025-08-06T08:33:41","slug":"windows-10-fat-file-system-fastfat-bsod-fix","status":"publish","type":"post","link":"https:\/\/www.stellarinfo.com\/blog\/windows-10-fat-file-system-fastfat-bsod-fix\/","title":{"rendered":"How to Fix the FAT FILE SYSTEM [fastfat.sys] BSOD Error?"},"content":{"rendered":"<?xml encoding=\"utf-8\" ?><?xml encoding=\"utf-8\" ?><p>Getting a blue screen on your system can be alarming. FAT FILE SYSTEM is a BSOD error that occurs out of nowhere and puts you in a vicious cycle of problems.<\/p><p>While googling around, we encountered many queries about the FAT FILE SYSTEM error. For some users, it just got solved by a simple reboot. However, a few unlucky ones experienced frequent system crashes and infinite BSoD loops with different error messages, consisting of Fastfat.sys file name in the error description.<\/p><p>The good thing is that the error is fixable!<\/p><p>We&rsquo;ve covered all the proven methods here to solve this annoying error. However, before you jump onto the solutions, understand their underlying cause.<\/p><h2 class=\"wp-block-heading\" id=\"what-is-fat-file-system-[fastfat.sys]-bsod-error?\"><strong>What is FAT FILE SYSTEM [FastFat.sys] BSoD Error?<\/strong><\/h2><p>FAT FILE SYSTEM error shows up with a blue screen and contains a value of 0x00000023. The error indicates issues with the FAT file system of the external or internal hard drive or USB drives. Mainly, the error prompts when there is a case of disk corruption or too many bad sectors on the drive. Other possible causes for this reason include corrupted SCSI or IDE drivers.<\/p><p>Usually, the error occurs while connecting the Hard Disk or USB drives to your system, copying something to them, or installing Windows on your system. In some worst scenarios, you experience this bug code right after booting your system.<\/p><p>Irrespective of the circumstance in which you find yourself stuck with this troublesome blue screen error, try the following methods to resolve it for good!<\/p><h2 class=\"wp-block-heading\" id=\"how-to-fix-fat-file-system-[fastfat.sys]-bsod-error?\"><strong>How to Fix FAT FILE SYSTEM [Fastfat.sys] BSoD Error?<\/strong><\/h2><p>The error won&rsquo;t let you boot into your system correctly. Hence, before you try the below-suggested solutions, we recommend you boot into the safe mode. Once you&rsquo;re in Safe Mode, try out the fixes right away.<\/p><h3 class=\"wp-block-heading\" id=\"h-method-1-run-chkdsk-to-scan-and-fix-the-faulty-drive\"><strong>Method 1: Run CHKDSK to Scan and Fix the Faulty Drive<\/strong><\/h3><p>The primary reason behind FAT_FILE_SYSTEM error is usually disk corruption. Corrupted drivers or hard drives with bad sectors can induce this blue screen of death error. So, to fix the error, you can run the CHKDSK command using the Command Prompt utility.<\/p><p>The CHKDSK command, when used with f and r attributes, finds out and repairs the corruption on the drive. Additionally, it prevents Windows to read and store data from the bad sectors on the drive. Thus eventually causing data loss.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong><u>Important:<\/u><\/strong> Connect the corrupted hard drive to a working PC and recover data using professional data recovery software, such as <a href=\"https:\/\/www.stellarinfo.com\/windows-data-recovery-professional.php\" target=\"_blank\" rel=\"noreferrer noopener\">Stellar Data Recovery Professional<\/a>.<\/td><\/tr><\/tbody><\/table><\/figure><p>Now that you&rsquo;re done with recovering your data from the drive, proceed with running the CHKDSK command with the following steps:<\/p><ul class=\"wp-block-list\">\n<li>Go to <strong>Search<\/strong> (pressing <strong>Windows + S<\/strong>), and type <strong>cmd<\/strong>. When you see the Command Prompt option, select <strong>Run as administrator<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"348\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/1.jpg\" alt=\"CMD\" class=\"wp-image-160845 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/1.jpg 624w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/1-300x167.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/1-150x84.jpg 150w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>In the elevated CMD window, type <strong>CHKDSK f\/ r\/ D<\/strong>: and press <strong>Enter<\/strong>. (Replace <strong>D:<\/strong> with your drive letter.)<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"578\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/2.jpg\" alt=\"CMD-chkdsk\" class=\"wp-image-160846 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/2.jpg 624w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/2-300x278.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/2-150x139.jpg 150w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure>\n<\/div><p>Let the process complete. Once the process is done, see if there are any further instructions to follow, read, and perform carefully. If you see no further instructions, exit the Command Prompt, reboot your system, and check if the error is gone.<\/p><h3 class=\"wp-block-heading\" id=\"h-method-2-update-your-device-drivers\"><strong>Method 2: Update your Device Drivers<\/strong><\/h3><p>Drivers allow communication between your device and the operating system. If the drivers get corrupted or faulty, they might result in Fastfat.sys BSoD error. So, as a resolution, try updating the device drivers with the following steps:<\/p><ul class=\"wp-block-list\">\n<li>Open <strong>Device Manager<\/strong> from the <strong>Start<\/strong> menu (Press <strong>Windows + X<\/strong>).<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"204\" height=\"487\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/3.jpg\" alt=\"Device-Manager \" class=\"wp-image-160847 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/3.jpg 204w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/3-126x300.jpg 126w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/3-150x358.jpg 150w\" sizes=\"auto, (max-width: 204px) 100vw, 204px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>There, locate and expand the <strong>Disk Drivers<\/strong> category.<\/li>\n\n\n\n<li>Right-click on the driver and choose <strong>Properties &gt; Update Driver<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"457\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/4.jpg\" alt=\"Device-Manager-USB-Properties\" class=\"wp-image-160848 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/4.jpg 624w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/4-300x220.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/4-150x110.jpg 150w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>On the following prompt, select <strong>Search automatically for drivers<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full is-resized\"><img loading=\"lazy\" decoding=\"async\" width=\"613\" height=\"454\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/5.jpg\" alt=\"Update-Drivers\" class=\"wp-image-160849 apply-gradient-on-post-images\" style=\"width:613px;height:auto\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/5.jpg 613w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/5-300x222.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/5-150x111.jpg 150w\" sizes=\"auto, (max-width: 613px) 100vw, 613px\" \/><\/figure>\n<\/div><p>Windows will find the latest driver versions available. Once found, download it. If Windows can&rsquo;t find any, you must manually download the latest compatible driver from the hard drive manufacturer&rsquo;s website.<\/p><h3 class=\"wp-block-heading\" id=\"h-method-3-identify-faulty-drivers-with-a-driver-verifier-remove-them\"><strong>Method 3: Identify Faulty Drivers with a Driver Verifier &amp; Remove them<\/strong><\/h3><p><\/p><p class=\"MsoNormal\" style=\"margin-top:12.0pt;margin-right:0in;margin-bottom:\n12.0pt;margin-left:0in\">Sometimes, corrupted SCSI and IDE drivers can also adversely affect the system&rsquo;s ability to read and write to the disk, thus resulting in the error. In this case, try to identify the main culprit with the Driver Verifier.Driver Verifier is a Windows built-in utility that tracks and monitors the kernel-mode drivers to detect illegal calls or actions while functioning, further leading to system corruption. You can start Driver Verifier using Command Prompt following <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-hardware\/drivers\/devtest\/driver-verifier\"><span style=\"color:#1155CC\">this guide from Microsoft<\/span><\/a>.<\/p><figure class=\"wp-block-table\"><table><tbody><tr><td><strong>Caution:<\/strong> Running Driver Verifier could lead your system to crash. Hence, try this method only after you&rsquo;ve tried all the above. Additionally, you run it on test computers with the administrator&rsquo;s rights. Further, be prepared with your data backup or keep <a href=\"https:\/\/www.stellarinfo.com\/windows-data-recovery-professional.php\" target=\"_blank\" rel=\"noreferrer noopener\">professional data recovery software<\/a> handy.<\/td><\/tr><\/tbody><\/table><\/figure><p>Once you determine which driver is causing this error on your system, you can remove them and reinstall the compatible driver versions from the manufacturer&rsquo;s official site.<\/p><h3 class=\"wp-block-heading\" id=\"h-method-4-reset-windows\"><strong>Method 4: Reset Windows<\/strong><\/h3><p>If the above methods don&rsquo;t work, try resetting your Windows. It will delete all the third-party apps, programs, drivers, executable files, etc., that might conflict with your Windows OS and cause fastfat.sys BSoD error. However, backup your data before performing this method to prevent unwanted data loss. Once you have backed up your crucial files, follow the given steps:<\/p><ul class=\"wp-block-list\">\n<li>Turn off your system (if already not) and reboot it.<\/li>\n\n\n\n<li>When you start seeing the Windows or brand logo on the screen, shut down the system forcefully.<\/li>\n\n\n\n<li>Repeat this thrice in total, and then you&rsquo;ll enter the Windows RE (Recovery Environment).<\/li>\n\n\n\n<li>There, the <strong>Automatic Repair<\/strong> screen will show up. Click <strong>Advanced options<\/strong> there and proceed.<\/li>\n\n\n\n<li>Next, click <strong>Troubleshoot &gt; Advanced options &gt; Reset this PC<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"486\" height=\"353\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/6.jpg\" alt=\"Trouble-Shoot\" class=\"wp-image-160850 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/6.jpg 486w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/6-300x218.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/6-150x109.jpg 150w\" sizes=\"auto, (max-width: 486px) 100vw, 486px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>The following prompt will show you two options &ndash; <strong>Keep my files<\/strong> or <strong>Remove everything<\/strong>. To make this method effective, we recommend you choose the &lsquo;<strong>Remove everything<\/strong>&rsquo; option.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"524\" height=\"419\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/7.jpg\" alt=\"Reset-PC\" class=\"wp-image-160851 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/7.jpg 524w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/7-300x240.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/7-150x120.jpg 150w\" sizes=\"auto, (max-width: 524px) 100vw, 524px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>On selecting <strong>Remove everything &gt; Change settings<\/strong>, you&rsquo;ll have two options.<\/li>\n\n\n\n<li>Data erasure <strong>On<\/strong> will clean the drive and remove all the files. It is safer if you want to dump or sell your device. Otherwise, keep the Data erasure option <strong>Off<\/strong>.<\/li>\n\n\n\n<li>Further, click <strong>Local install<\/strong>.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"594\" height=\"412\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/8.jpg\" alt=\"Cloud-Download \" class=\"wp-image-160852 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/8.jpg 594w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/8-300x208.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/8-150x104.jpg 150w\" sizes=\"auto, (max-width: 594px) 100vw, 594px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>On the following prompt, choose the <strong>&lsquo;Only the drive where Windows is installed&rsquo;<\/strong> option on the following screen.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"488\" height=\"386\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/9-1.png\" alt=\"Only-the-drive-where-windows-is-installed \" class=\"wp-image-160854 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/9-1.png 488w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/9-1-300x237.png 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/9-1-150x119.png 150w\" sizes=\"auto, (max-width: 488px) 100vw, 488px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>Further, select the &lsquo;<strong>Just remove my files&rsquo;<\/strong> option.<\/li>\n<\/ul><div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"624\" height=\"389\" src=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/10-1.jpg\" alt=\"Just-remove-my-files\" class=\"wp-image-160855 apply-gradient-on-post-images\" srcset=\"https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/10-1.jpg 624w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/10-1-300x187.jpg 300w, https:\/\/www.stellarinfo.com\/blog\/wp-content\/uploads\/2024\/01\/10-1-150x94.jpg 150w\" sizes=\"auto, (max-width: 624px) 100vw, 624px\" \/><\/figure>\n<\/div><ul class=\"wp-block-list\">\n<li>And, finally, click the <strong>Reset<\/strong> option on the <strong>Reset this PC<\/strong> screen.<\/li>\n\n\n\n<li>Once the process is complete, reboot your system and check if the Fastfat.sys BSoD error is gone.<\/li>\n<\/ul><h3 class=\"wp-block-heading\" id=\"h-method-5-perform-a-clean-installation\"><strong>Method 5: Perform a Clean Installation&nbsp;<\/strong><\/h3><p>Even after resetting Windows, if the error persists, <a href=\"https:\/\/www.microsoft.com\/en-us\/windowsinsider\/cleaninstall\" target=\"_blank\" rel=\"noreferrer noopener\">perform a clean installation of your Windows<\/a> with a clean\/formatted USB bootable installation media drive. It will wipe your computer and make it as fresh as new. So, be sure you have a backup of all the essential files you don&rsquo;t want to lose. If not, download a professional data recovery software to <a href=\"https:\/\/www.stellarinfo.com\/blog\/recover-data-reinstalling-windows\/\" target=\"_blank\" rel=\"noreferrer noopener\">recover data after reinstalling Windows<\/a>.<\/p><h2 class=\"wp-block-heading\" id=\"final-words:\"><strong>Final Words:<\/strong><\/h2><p>By now, you should be able to fix the FAT FILE SYSTEM [Fastfat.sys] BSoD error on your Windows system. Users sometimes fix this error by testing RAM with the Windows memory diagnostic tool and <a href=\"https:\/\/learn.microsoft.com\/en-us\/windows-hardware\/drivers\/devtest\/editing-boot-options\" target=\"_blank\" rel=\"noreferrer noopener\">reconfiguring the bootloader settings<\/a>. You can also try doing the same. In case of any queries or suggestions, please let us know in the comment section below!<\/p><div class=\"wp-block-columns is-layout-flex wp-container-core-columns-is-layout-9d6595d7 wp-block-columns-is-layout-flex\">\n<div class=\"wp-block-column is-layout-flow wp-block-column-is-layout-flow\" style=\"flex-basis:100%\"><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Getting a blue screen on your system can be alarming. FAT FILE&hellip; <a class=\"more-link\" href=\"https:\/\/www.stellarinfo.com\/blog\/windows-10-fat-file-system-fastfat-bsod-fix\/\">Continue reading <span class=\"screen-reader-text\">How to Fix the FAT FILE SYSTEM [fastfat.sys] BSOD Error?<\/span><\/a><\/p>\n","protected":false},"author":81,"featured_media":160857,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[5960],"tags":[],"class_list":["post-160773","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-blue-screen-of-death","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] FAT FILE SYSTEM [fastfat.sys] BSoD Error on Windows<\/title>\n<meta name=\"description\" content=\"Fix the FAT FILE SYSTEM [Fastfat.sys] blue screen error by running the CHKDSK command or updating 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