John, and anyone else who has malware that prevents your antimalware or antivirus programs from running can use RKill. It kills the malware processes but does not remove it. Just run RKill and then when it displays that the malware has been stopped, run your MBAM or SAS or AV program.Found a jqs.exe file in task manager and was able to kill xp antivirus 2011, although it kept coming back every time I tried to log on, I left taskmgr open and just kept killing it till I got on-line.
As RKill is updated regularly, you should only download and run it as and when needed. You cannot download a version and install it to keep 'just in case'.
Instructions and downloads are available at Bleeping Computers