I have two computers with seperate but similar issues. I'll post this computer's issues as melnphil and the other computer as melnphil2. Just putting that out there to hopefully lessen any confusion about posting twice.
This computer is XP Pro SP3 with IE 8 and AVG 8.5- this computer is used by one of my daughters
The problem started with Your PC Protector. I've used both Malwarebytes and HijackThis in the past so started with those. Malwarebytes will not run, HijackThis will but hasn't been effective. I know just enough about these two to not really screw things up but not enough to figure out why they aren't working. I've read through the forums here for steps and either some of them aren't working, I am missing steps or I have more than one issue.
So far I have:
Run DDS and saved the log
Run GMER and saved the log
Run RKILL which will sometimes kill Your PC Protector
Have tried to run Malware Bytes getting various errors with the program never actually opening. For this when I try to run I get Runtime Error '0' followed by Runtime Error '440' Automation Error. I've tried renaming mbam.exe to alg.exe, no luck. I tried a download that generated a randomly named malwarebytes.exe, no luck. I tried to run mbam-clean, no luck it gives error SHGetValue failed with error code 0
I ran RSIT which seems to be related with HijackThis? and have saved that log.
I ran HijackThis and fixed all the suspect files I could find but they keep coming back
Run AVG it found Vundo.KG in three different instances and KillAV.ALW and allowed me to move them to the virus vault, rescan did not find these again- but the problems persist
Reboots load Your PC Protector and the problems begin again.