Fix: FAT FILE SYSTEM (fastfat.sys) Blue Screen on Windows 10

You may see FAT FILE SYSTEM Blue Screen because of various reasons like flawed Hardware, bad sectors in Hard Drive, and so on. The primary driver is circle corruption in the file system or awful squares (areas). Debased SCSI and IDE drivers can likewise cause the mistake.

In this article, we will fix the FAT FILE SYSTEM (fastfat.sys) Blue Screen on Windows 10 with the assistance of some straightforward solutions. Fastfat.sys is a Windows working system driver file.

Fix FAT FILE SYSTEM (fastfat.sys) Blue Screen

These are the things you can never really FAT FILE SYSTEM (fastfat.sys) Blue Screen on Windows 10.

  • Run CHKDSK
  • Run Verifier to discover Driver Problem
  • Update drivers using Optional Updates
  • Fix Windows 10 using Installation Media
  • Check the Hardware for deficiency.

Allow us to discuss them exhaustively.

You should use the Command Prompt. If you can sign in regularly, great; else you should boot into Safe Mode, enter the Advanced Startup options screen, or use the Installation Media to boot to have the option to complete these instructions.



As mentioned before, the issue can be because of a terrible area in the hard drive. Along these lines, to fix it, you need to run the CHKDSK order.

In any case, before running the order, boot your PC in Clean Boot State or Advanced Option using the Installation Media. Now, open the Command Prompt as an administrator in both of the two and run the accompanying order.

chkdsk /f /r

You will be approached to confirm your action, along these lines, hit “Y” to do that.

At long last, boot your PC in an ordinary state and check if the issue endures.

2] Run Verifier to discover Drive Problem

Run Verifier to discover Drive Problem

One of the things you can do to fix the mistake is to run Driver Verifier to discover if there’s an issue with the installed drivers.

Along these lines, open Command Prompt as ahead and run the accompanying order.


A wizard, Driver Verifier Manager, will spring up. Click Create standard settings > Next > Automatically select all drivers installed on this PC > Finish.

Now, trust that the interaction will finish and your concern will ideally be settled.

3] Update drivers using Optional Updates

Open Windows 10 Settings > Update and Security and check if any Optional Driver Updates are accessible. You might need to install them.

4] Repair Windows 10 using the installation Media

Something else you can do to fix the blunder is to fix your OS with Installation Media. This will fix your OS without erasing any personal files.

5] Check the Hardware for fault

Now this one is intended for equipment specialists – so if you are not one, we propose you consult an equipment expert.

Also see: Fix: Can’t Type Password at the Login Screen in Windows 10

  • You need to will be to check if the blunder is because of a flaw in the Hardware. The odds are that it very well maybe your Hard Disk!
  • For that, you need to dismantle your PC and afterward add the component one by one to see which device is broken.
  • Remove all the USB ports, outside drives, and SD Cards and continue to check for issues.
  • If you have various RAMs, unplug them and attach them one by one to check whether one of them has malfunctioned.
  • Remove one of the SSDs and HDDs, if you have various ones, and check for issues.
  • Hard Drives are generally responsible for these blunders, thus, give close consideration to this one.
  • Remove Graphic Card, anticipate the Integrated one.

Now, start adding the components one by one to reevaluate if the blunder is because of them. This may take some time yet don’t skirt a solitary advance.

If you know the reason for the shortcoming, supplant that device and you will be a great idea to go.

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