i was infected by virus protector the past few days , if you dont have malware protection i recomend finding something or it could take over your pc as well.
its a money scam program. you cant do anything with it and anytime u click anything it says buy the product to get rid of the threat when the program itself was the real problem...
it made a fake admin user account an took over everything after makin harmless files an sayin i was under attack no close options task manager didnt open because of it.
i had to use the c: command prompt safe mode and use system restore command.
%systemroot%/system32/restore/rstrui.exe
took a while to figure out i tryed everythin and the xp disc to reformat didnt work either . i'm lucky whoever created it forgot/didn't know about that command.
Porn is bad dude.. dont do it 
I havent had a virus since 03. I've fixed mainly of them. But he is right though. About 70%-80% are from porn, 10%-15% are ads and hacked sites, 5%-15% are from infected emails.
Best solution get an antivirus. Get Avast/AVG (Free)
Then get malware.Get Malwarebytes/A squarded (Free)
Registry Cleaner. Get Ccleaner
Backup Weekly. Get a schedule set .
Clean your computer every week. Get a schedule set.
Also was your virus vista internet security or internet security 2009/2010
Korori