I'm looking for either a list of security apps or other techniques that can be used to protect the MBR (on xp/vista). It would be really nice if there is some app or way to prevent anything being able to write to the MBR or make any changes to it, is this possible? I'm not looking for a program that will only detect viruses in the MBR, but any kind of changes made as well. I'm hoping to prevent anyone from tampering with the MBR on this pc, even when/if they could obtain physical access to this machine. Ok, maybe in the case of physical access I wouldn't be able to do that much to protect the MBR, but in that case some kind of warning after the fact that the MBR has been tampered with or changed would be nice. Well nothing maybe is 100 percent, but I'm hoping to get as good as I can protection for the MBR. This is related to the problem with TrueCrypt full disk encryption being able to be bypassed, discussed already on the forums here, but also against other bypass/infection techniques too. Thanks very much for help in this area.