Well, I've been having a problem with a nasty virus on my main computer. It wouldn't let me run ANY of my anti-spyware/anti-virus programs. I've tried several solutions presented online, but none were successful since they involved programs that I couldn't run. Well, I tried restarting my computer, and now I can't even log on. It doesn't even take me to the start up screen. After the Microsoft logo happens, I see the mouse cursor as if its about to take me to the log on screen, but before it gets there, it just restarts. I am truly freaking out over here. I have many, many important files that I didn't get a chance to back up. Can anyone help me out here? I would very much appreciate it. Thanks!

Oh, and I can't run Safe Mode or anything. I've tried booting from last good configuration, but still no luck.