Vista 32 bit freezing after login

Ok so I couldn't find anything about this in any other threads so I am starting a new thread. If there is another thread on this exact same problem, I'm sorry but I couldn't find it; if someone would be kind enough to post the link here, I would be grateful.

So I will try to give as much relevant information as I can about my problem to make it easier for anyone helping. Thank you in advance to anyone who reads this and tries to help.

I am running Windows Vista 32 bit with Service Pack 1.
Last night when I was using my computer, it just suddenly froze and while I could move my mouse I couldn't click anything. I just figured that it froze and that it would be ok today. But now every time I log in to the only account on my PC, it will freeze up and I can move my mouse but I can't click anything. Even when I press ctrl+alt+del nothing happens.
I can start it up in Safe Mode and it works fine (So this leads me to believe it is not a hardware problem and it could also be an aero problem since I can't change the colour scheme to aero while in Safe Mode).
I have already uninstalled/deleted some of the unnecessary startup programs that run on startup (Windows Live Messenger, LogMeIn, etc) through Safe Mode but the problem persists.
Last time I logged in normally I noticed something that looked like command prompt flash on my screen for about half a second. So I didn't have time to see it. Then immediately after that the screen froze again. I rebooted the computer again and logged in normally, to which I noticed it flashed on my screen again. I can't tell what it is and if it has any relevance to this problem.
I now have that computer being fully scanned by McAfee while in Safe Mode (since I can't access it any other way that I now of) to see if it is a virus, but it won't be finished for a long time and I'm not sure if the problem is a virus. So I was wondering if anyone had any information that could help?

Thank you.