Tried running SAS or any other program when running in Safe Mode?
Make sure System Restore is also disabled.
5.
to stop things coming back..
get them to buy nod32, install spyware blaster & spybot, and use the immunize features.
install Firefox, with adblock plus and maybe Noscript.
tell them never to use IE again
Spybot Search and Destroy
Ad-Aware
Windows Defender
Comodo BOClean