dunno what you use for spyware and malware stuff, but an underestimated program is called Spywareblaster, look it up on Download.com. it acts as like a spyware firewall and prevents it from installing. so i use spywareblaster and spybot search and destroy, along with the free AVG anti-virus. and i have very few problems.
give em a try and i think youll like them!
Made by DP
R.I.P. Evan Tanner, you will be missed....