I sweep my pc weekly for viruses,spyware,etc, in safe mode. I scanned with avast!, Spybot S&D1.3, Microsoft Anti-spyware Beta, Ad-aware SE Personal and Ewido Anti-Trojan. Ewido found and cleaned 'Backdoor.Superstar.21 in [C:\WINDOWS\system32\actskin4.ocx].
Is it completely gone? Is there a need for me to delete my restore points. What does Backdoor do?