Alright GBAtemp, I need some help quickly. My laptop was working fine as of yesterday night, but when I tried to boot it up today, it would fail to start up. It'd try boot into Windows, only to BSOD and instantly restart when at the 'Starting Windows' screen with that loading bar. It ran on Windows Vista Ultimate, a Toshiba Satellite that's about 4 years old. I have no idea what's going on, but I need this issue resolved as soon as possible... Update: It's likely not a hardware failure, as I booted into a Ubuntu Live CD and could access my Windows drive's contents from there. Update 2: The BSOD error says something was changed about Windows, and it wouldn't let me boot into it to 'prevent further damage'. Error 0x0000007B. Update 3: I tried booting in with the 'boot with last known succesful boot options' or whatever function, and now it's giving me that Windows is not genuine. Security Essentials got de-activated, and it's telling me to validate my Windows copy. I've used the laptop for four years, no such problems, and I can fucking guarantee the damn thing is genuine. Purchased straight from Future Shop. Now what? Any help would be greatly appreciated. Issue has been resolved, thanks everyone!!