Malicious Software?
 

When I open Windows Messenger I get an error, not from Windows or Mcafee, says my computer was infected by an unknown trojan. Asks me to download a program to clean it. So I ran Mcfee and Ad-Aware 2007. Neither found anything. What to do next?

go here Malicious Software Removal Tool and download this tool
while your at it try this too Windows Defender - Spyware Protection for Free

both free from microsoft but ya will need Internet explorer to download it

Yup you got some Spyware on your computer.

you can also go here AVG Free Advisor - Free antivirus and anti-spyware downloads and get free virus protection

I use AVG on my computers :up:

Anyone ever mess w/ Norton? It always choked my computer to death before the malicious code ever got a chance to.

Norton eats your computers resources..... it always slooowwwed my computer down to much for me. I also like FREE. :U:

used to run norton years ago til i got a back door virus and norton never ever found it, scraped norton and went to avg

I run Norton, Spybot, CCleaner, and ad-aware. Between them they have covered everything so far. In my case Norton works great and the lifetime updates came with it, but I'm also only using 18% of my disk space though to, so there is plenty of space for it to spread out.

Maybe it's time for change. Windows already has you covered w/ a firewall and malicious s/w removal.