I came home yesterday to my computer doing weird things, including opening up windows explorer and lots of tabs on Mozilla. I realized it was a virus and did a virus check. I run Windows XP SP2. I went to safe mode. I use AVG for anti-virus, it found about seven viruses, led by Trojan SHeur2.JDY. Some of the files it cleaned were frmwrk32.exe, mousehook.dll, ntdll64.dll. I ran Spybot and cleaned a couple more. I ran CCleaner. I looked for some files that I found online to look for like Viewpoint files, gehumuro.dll, but did not find them. I ran HijackThis but did not come up with any checked instances, so I just closed it.
I thought things were clean, but now my computer will not do anything properly. Often it stalls on the Windows welcome screen after rebooting. If it does load Windows, my wallpaper does not show. If I try to access the web, nothing appears in my browser. I checked my DNS settings and they appear to be the same IP addresses as my other networked computer. I ran the anti-virus again and came up with nothing. I can run some programs (no online access though), but then all of a sudden the computer reboots.
I am not an expert by any means, but I have tried some things that I have read to do, including the tacked threads here, and I am completely perplexed. I'm prepared to reformat, but I thought I would ask here first for any leads on what is wrong, or what I might have done wrong. Thanks for any ideas!