I run 7 Ultimate and have had to do clean reinstalls 4 or 5 times due to corruption in the os. I just did another install last night, ran updates and no problems. Shut the system down to plug In my hdd and upon reboot it goes straight to repair screen telling me there's files that are corrupt... now last os install only lasted a month and it would auto run chkdsk and fix a bunch of errors about every other boot. I cant imagine it's software that is this bad over and over again....I think it's my ssd (OCZ Vertex 450) but want someone else's opinion before I really start bitching to OCZ/Toshiba as my ssd is still a supported warranty. .. thanks.