fdisk /mbr (in dos) will restore your master boot record to the way Bill Gates wants it.
>I had Hamm previously installed on my laptop, which is for the record >a Toshiba T4400C. I want to go back to DOS. I've tried to go back to >DOS by repartitioning in Linux so that I only have 1 partition which >is the C drive...and that's a DOS FAT16 (big) partition. Now when I >then go into DOS fdisk, and try to parition it there. It'll reboot >but then it will NOT change ANY partition information. It's like it's >locked like that. And then when I reformat drive C with Dos format, >it'll reformat (using the /s option) so that i can get the system >transferred properly, then when I reboot, my computer will not boot >from the hard drive at all. It'll just lock up. And I have tried >clean operating systems so I know it's not the disks. What do I have >to do to be able to boot from DOS 6.22 once again, without any linux >stuff on my HD? Thanks much!