There are several system files in Windows operating system that are critical for the proper functioning of the system. One such file is 'fastfat.sys' file that is the driver file to read or write drives formatted with FAT file system. Such drives could include hard disks, USB sticks, external hard disks, etc.
If something wrong happens with this file, then you would not be able to start the system. Such problems can occur due to lots of reasons such as virus infections, hard disk damage, power surges, etc. You should recover hard disk by restoring the file using appropriate methods. If you are unable to do this, then you should use a third-party hard drive recovery software to recover the lost files.
Consider a scenario wherein you have a Windows 2000 system that is not starting and stopping after the boot process. The following error message is displayed in this regard:
“Windows could not start because the following file is missing or corrupt: System32\Drivers\FastFAT.sys”
Cause:
This problem can occur if either of the following cases are true:
The fastfat.sys file is either damaged or missing.
The RAM is damaged or is not installed properly.
Resolution:
The resolution to this problem involves checking the RAM and restoring the Fastfat.sys file. This could be done using the following steps:
Turn off the system and check the RAM to ensure that it is not damaged and installed properly.
Start the computer using Windows 2000 setup CD.
Type the following command in the Command Prompt, and press Enter:
cd c:\winnt\system32\drivers
Type 'dir fastfat.sys' and press Enter. If the 'File not found' message does not appear, then perform the next step.
Type 'ren fastfat.sys fastfat.old' and press Enter.
Type 'CD-ROM drive letter:' and press Enter.
Type 'cd i386' and press Enter.
Type 'expand.exe fastfat.sy_ c:\winnt\system32\drivers\fastfat.sys' and press Enter to expand the 'fastfat.sys' file.
Type 'c:' and press Enter.
Restart the system.
However, if the system remains inaccessible even after performing these steps, then you should urgently take the services of a third-party hard disk recovery software to recover all the trapped data. With the help of non-destructive scanning mechanisms to recover hard disk, these data recovery utilities do not hamper the files in the storage media.
The most reliable disk recovery utility that recovers lost, deleted, or formatted files from different file systems such as NTFS, FAT, and exFAT, is Stellar Phoenix Windows Data Recovery. Available in two editions, Home and Professional, this hard disk recovery software supports recovery in memory cards, iPods, pen drives, hard disks, etc. Compatible with Windows 7, Vista, Server 2003, XP, 2000, and NT4(SP6), this disk recovery software recovers deleted emails from Outlook Express and MS Outlook.