This error message is generated when a problem has occurred with the FAT file system. There may be a physical problem with the disk, or an interrupt request packet (IRP) may not be able to be successfully completed or may be corrupted. The problem may also appear if the hard disk is fragmented or if there is excessive file I/O.
Drive-mirroring software or antivirus software might cause this problem. If the error appears after you installed this type of software, search for updates or remove the software.
Microsoft recommends the following troubleshooting steps:
1. Disable all file system filter drivers, such as backup utilities, virus scanners, or firewall software.
2. Check for hard drive corruption by running CHKDSK /f and then restarting the computer.
3. Check the file properties of the Fastfat.sys file to ensure that it matches the current version of the operating system or service pack.
4. Update all disk, tape backup, CD-ROM, or removable device drivers to the most current versions.
See the links below for more information on this error.
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