Really crappy day

Go to this site Safer Networking Forum and surf around for instructions of what first to do in case of a malware infection; also download Spybot Search & Destroy (just do a Google search for it) and run a scan. If none of those work download HijackThis (also just search it) and post a log on the forum I linked and someone on there should give you very specific instructions on how to fix your computer.

It is kind of involved and it takes a long time but at least it's free and you get all your stuff back.

OH and almost forgot: try to start Windows in 'Safe Mode with Networking' by pressing the F8 key on your keyboard a bunch of times when the computer's first starting up.