How do I start my computer in dos mode so I can re format it?
The answer is to get a MS-Dos (probably 6.2) and leave it in the a: drive when you start up the computer. This presumes that you have your Bios set to boot to A:, or the CD drive before the Hard Drive. If not, press F2 (usually) before OS startup and set the defaults as stated above. Next, at the a: prompt, (if formatting a raw hard drive) run FDISK.exe to set up the partitions. (Note that MS-DOS will not recognize more than 10 Gbytes, and will only partition up to 2 Gb) Then run format c: If you run Windows XP, you can also invoke “CMD” from the run menu and format in FAT, FAT16, FAT32 and NSTC. Old MS-DOS is FAT.