Virus or something =/

Something on my compy is creating these random string dll files. Ad-Aware scans and finds them but can't delete them. BitDefender doesn't even see them. They don't show up in HijackThis. They're mad crazy and I realized a couple of things: they all have the size 230kb so it makes it easy to find them all, they always come in pairs of random strings and then one random file (i've seen guard.tmp and now it's iggutil.dll), I tried a couple of different unlocking and forcedelete progs cause I couldn't delete them and they wouldn't show up in Ad-Aware's process watch but I found out they're attaching themselves to winlogon.exe which I can't terminate. The really vicious part of w/e this is is that it makes new copies of itself everytime I login. I tried running in commandprompt mode but in that they haven't been created yet =/ and the old ones are dead or something. I don't understand how I can get rid of something like this. I don't know exactly what it's doing but I figure it has something to do with the 52 other viruses I found and all the spyware like Zedo and Surfsidekick. I'm pretty sure I know how I got it but I've got no idea how to get rid of it. I'm running Windows XP and I'm hella confused.