I am using a multi boot system with WINXP and Ubuntu 7.04. My windows is badly infected with viruses and I have tried many anti-virus software. The all fail to remove the virus. the virus is slowly choking my system to death. Its changing the security policy so i cannot open network connections and stuff. and changing the policy back doesnt help either. I can see that my kernal32.dll shell32.dll and some other system files are infected. should i just delete these files and try a repair with WinXP? If i really need a clean install, the GRUB is lost. Is there a way to restore the GRUB then?