How to Solve FAT FILE SYSTEM fastfat.sys Error on Windows

The error message FAT FILE SYSTEM generally appears when your operating system gets outdated or your computer drivers are outdated.  It can also appear due to corrupted drivers, application that protect specific files and folder, corrupted Windows, and security applications. Let’s troubleshoot the FAT FILE SYSTEM error. 

Fix 1: Removing Defective Hardware from Computer  

The FAT FILE SYSTEM error can appear when there is a defective item connected to your computer. In this method, you have to disconnect all hardware from your PC and then plug in back all components one by one will help you to identify the hardware which is causing the error on your computer. Here’s how to get this done:

1. First of all, power off your complete device and its connected hardware.
2. Make sure all USB ports are free from any connected device such as flash drives, printer cable, speaker cable, USB hub ports, external storage and more.
3. Plug out your keyboard and mouse, if you are using a desktop.
4. Now plug the keyboard and mouse back to their respective ports.
5. Open the CPU panel or RAM slot panel and remove all RAMs but leave one of them.  If your device has a single RAM then leave this step. 
6. If your PC has two storage devices such as an SSD and HDD, then make sure to remove all storage devices except the one which contains the operating system.
7. Remove the aftermarket graphics card and no need to remove the integrated one. 
8. Now turn on your PC and see if the FAT FILE SYSTEM error is resolved or not.
9. If the error is solved then power off the computer and connect any one of the disconnected devices. 
10. Power on again and see if the error appears once again.
11. If the error is not there then keep on connecting all disconnected devices one by one.
12. When you find the faulty item make sure to remove it and then you can get it fixed or replaced.

Fix 2: Using the ChkDsk Command

If you use your computer for long durations each day then your hard disk can be damaged or may act up. Prolonged usage of computers can affect your hard drive and your hard disk might experience issues like corrupted software, bad sectors of hard drive, unexpected shutdown and corruption of metadata. To check and repair a bad hard drive, you can use the CHKDSK utility developed by Microsoft. Many users have solved the FAT FILE SYSTEM error by using the CHKDSK utility. Here is how to solve the FAT FILE SYSTEM error via CHKDSK:

1. If you can access the Safe Mode on your computer then see step 10. 
2. In case you are not able to use the Safe Mode then access Advanced Repair Options on your PC and then see step 10. 
3. If Advanced Repair Options cannot be accessed then make a Windows Installation Media using the Rufus tool. 
4. Once the Windows Installation Media created, turn off your PC which is showing the FAT FILE SYSTEM error. Plugin the Windows Installation Media and boot your computer from it.  You can do that by changing the boot preference in the BIOS menu. 
5. When the Windows installation wizard appears, press on Next.
6. Tap the Repair your computer option from the bottom-left corner. 
7. After that, press the Troubleshoot button.
8. Now head to Advanced option in the troubleshooting wizard.
9. Navigate to Command Prompt.
10. Inside the Command Prompt window, type the chkdsk /f /r command.
11.  Hit the Enter key.
12. When asked for confirmation, press the Y key to allow the system to restart the device once the operation completes. 

Emily Johnson is a creative writer who has been writing blogs and articles about cyber security and the latest updates about the technology. She writes about the latest updates of norton.com/setup and how it can be change the work experience of the users. Her articles has been published in many popular e-magazines, blogs and websites.

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