- fdisk /mbr and fixmbr will fix the MBR but not necessarily get rid of any viruses in it [msoft].
- Use the Ultimate Boot CD which has a bunch of low level HD tools from various manufacturers to zero fill the drive, erasing the MBR and any other possible hiding places for the virus. I used the iso found at mrbass.org.
I decided that my parents computer was infected by a boot sector virus because:
- Installation of Linux or Windows XP went fine from CD.
- After the first reboot win xp or linux would stop working and freeze during bootup
- I could get winxp working again by booting into recovery mode and using fixmbr
- A scan by the seagate tools did not uncover any errors in the disk