I obviously have gotten a virus or two. When I log in this window pops up, it looks like an msdos window, and then there ends up being about 8 of them.
I'm then prompted with a little button that says close or cancel, something along those lines. I've ran avg and pctools anti-virus scans on it and it hasn't fixed it. What do I do?
Try using malwarebytes:
http://www.malwarebytes.org/
Or SpyBot Search and Destroy.
The thing about using anti-viruses against Spyware is that they're not looking for those necessarily.
I've found that a lot of those spys disable stuff, like Windows Update, AVG's ability to update, and running Spybot/Malware bytes.
What I usually do is simply look in the system32 directory under windows, sort my date modified, and look for some curious DLL files. Then I use a variety of software - process explorer and unlocker - to pin point the bad DLL, kill it out of memory, and use unlocker to unlock and physically delete it. Then run anti-spy software to remove the left overs. Also helps to clean up stuff that's loading with another program called autoruns.
But this isn't recommended as you can really screw up your system if you don't know what you're doing. But this has been the only way I've been able to get rid of some. Also would be wise to use a program called WireShark to verify that you don't have any traffic spewing from your machine, but again, another advanced tool...
Pete