Ive had no issues up until last night when i reboot it gets stuck on the welcome screen and after a min or so the screen goes black. I thought it was the windows update i did a few days before so i rebooted in safe mode and did a system restore and it didnt make a difference. I can boot into safe mode with no problems. I tried another video card and it booted to desktop so i thought it was my GTX 480. I rebooted again with the working video card and the same thing happend WTF. I tried repairing the system with the options available when booting but it came up with no errors etc. I tried different ram unplugging my sound card nothing. After about another 20 boot attempts it got past the welcome screen and im afraid to reboot again. I havent changed any settings or downloaded any thing that might be a issue. I checked for virus and spyware and came up with nothing. All my temps seem fine i want to try to clock back to stock speed on my cpu but dont want to reboot. Ive had a stable overclock since the summer not to sure if this could be an issue. My ram is at stock speeds also.