I am at my wits ends here. Last night as I was playing some cod4 and TF2, I saw that my usage kept jumping between 15% - 86% but then it would drop back down, and yadda yadda. I saw that my PF usage was about 1.17GB and that it almost used all of it. Anyways, I meant to scan like I normally do with Malwarebytes Anti Malware but I forgot, and shut the computer down. Well I turned it on this morning, and now it is doing it again, the whole 100% cpu usage even though when I do get the Task manager to show up in XP, it says it has 0% usage. So I run in Vista the Malwarebytes and check both the hard drive partitions and it shows up nothing. Before when I had this same issue, it showed up 2 trojans named servauth1.dll and servauth2.dll. And still AVG did not catch either of these. Anyways, before when I removed it, everything seemed to work fine. So now I get into safe mode with networking, and I post my HJT log on a website I usually go to, to fix my issues. Now, I come back about an hour or 2 later, to run vista, I get something that says installing something to my registry, and vista blacks out and nothing happens, I restart in safe mode, and it takes forever to load back up. I start running malwarebytes again, and I come back from a phone call, and my computer has restarted back into vista normally and everything is working fine now. So I am confused to hell as what to do. I don't have a legit copy of any OS anywhere, except for my Laptop CD which came with XP. I probably need to format, but I am at my wits ends on how to get this damn thing fixed. I am probably going to find a new AV since AVG is sucking balls right now and not finding anything, even though I know something is there. So if anyone can help me, please do so. Thanks to anyone who can help, and sorry for the long read. Just to add, at one time when I got the task manager to show up, I showed to instances of wuauclt.exe in my process list. One under system, the other one under my name as if I ran the program. I know I have never seen 2 of them before. So any thoughts?