Can't fully boot into Vista.

[QES]

This morning I shutdown my computer, as I was going to transfer everything into a different case that I had so there would be room for my new video card.

I unplugged the power supply and started unscrewing everything held together. I took the power supply out first, then pulled the motherboard out. I realized then that I wouldn't actually need to use my other case, I prefer this one so I put everything back in. There's not a whole lot of components to my comp right now. A single HDD, DVD burner.

So I try to boot back up and everything is going fine, show's boot options, I can see the windows bar loading. Then the windows vista logo pops up, like it's going to the login page. But as soon as it get's past that, the screen goes black and all that is visible is my mouse cursor.

I restarted a few times, same thing. So I plug my monitor into my onboard vga input on my motherboard, same thing happens at the same point. I put my windows vista disc in to have it try and repair, hasn't solved it. Any suggestions?

specs
9500 phenom
ati 2400xt pro
mcp61pm-gm mobo

 

[QES]

I was just going to try and do a system restore, earliest is to yesterday. I'd rather do this if there was only nothing else to do, I'll lose about 3 gbs of new stuff. No other suggestions?