I already had upgraded my xp to vista prem. (had better parental controls). I lost my hard drive with everything so i reinstalled xp, then vista again on a clean new 1tb sata internal hd.Everything went well. I also had purchased Pc Linux OS 2009. I figured i had such a big drive I would have dual os. I installed linux.That installation went well also (and much faster that the upgrade to vista). Now I am not able to boot vista back. It seems as if linux has made itself the default. Any help would b app.