Argh! Boot with a bootable floppy disk that has FDISK.EXE on it. At the prompt, type "fdisk /mbr" (without the quotation marks). That will rebuild the drive's master boot record. If you don't have Norton Utilities, find someone that has. You only need one DOS program from Norton Utilities - NDD.EXE. Run it from an prompt as "NDD /rebuild." The "/rebuild" switch will completely rebuild your FAT by reading the start and ending file clusters for every file on your hard drive. If you're running Windows 95/98, I recommend you invest in Norton utilities 2000 (SystemWorks 2000 is even better). When installed, every time your system boots, Norton backs up your FAT. Later, if your system has a bad FAT, Norton will automatically repair/replace it for you.