And whats it do?

a Trojan is a little piece of code that is added into your OS....it basically creates an open door for a hacker to easily enter through, thereby giving them control of your computer

That's interesting. How would you get rid of something like this?

by using a program to delete the entries or manually doing it your self..said entries are usually in your registry, and by using regedit one can go in and delete them...

I just had to do this yesterday whilst dealing with the pipas.a trojan...no program would delete it, though Spybot would detect and delete ONE of the entries, but not totally kill the sucker..so in the end I had to boot into safe mode and delete the .exe that was being slealthy and changing its name every boot up, and then delete the registry entry..seems to be gone now...

I came across a trojan today. McAfee noticed it. It was in my temporary internet files so I deleted all of them and right now I'm doing a virus scan. Is there anything else I should do just in case?

download and use Spybot Search&Destroy (when updating I have found the 'Safer Networking #1' server to be the most reliable, and also get AdawareSE...

update both and scan with them

if you find something, it is a good idea to reboot and scan again to see if it comes back (like the one I had did) so that you know what's up...

Am I to assume that this SpyBot is free? I'll do a search on it right now.

indeed both spybot and adawareSE are free downloads

I just downloaded SpyBot Search&Destroy. It asked if I want to make a backup registry key. What the hell is that and should I make a backup of it? Sorry for all the questions but I never had to do this before.