BSoD flashes while at the loading screen. Any help?

I have Windows 7 Black Edition R1 32bit installed on my Qube laptop. But it got f**ked up when I tried to use RemoveWAT since it is telling me that I should use an activation key. After using the program, it rebooted, and while at the loading screen, it flashed a BSoD error (I don't know what error it is, since it is too fast) then it restarted. It brought me at the Startup Repair option. I did a startup repair, but nothing seemed to work. How can I fix this? Please help me as soon as possible. Thanks.