A little backstory:

My brother plays on Steam and G-Mod, specifically on the Dark RP servers. He has downloaded things that don't mess up our computer. Yes, for awhile G-Mod and our video card clashed, however this was because G-Mod wasn't downloaded with this specific card in mind; so he deleted it, then re-downloaded it and it worked fine ever since.

Right now, we've got two Trojans on his account on the computer. They're extremely isolated, and don't seem to be affecting the rest of the computer. It keeps trying to scan his half and it's getting irritating for him, as he can no longer talk to his friends on Steam as it'll crash it. It popped up twice in Local Settings on his Firefox and once in his Cookies. I can't particularly remember if that was the exact name of the Trojan; in any case, Dad and Mom tried to delete it, but it came back. It came on Facebook.

Can somebody help us? It doesn't happen only when the internet is open; it happens when his account is the one logged in.

One of them was named Freddy73.exe.

http://www.lmgtfy.com/?q=Freddy73.exe.+

Also, running any of the good virus scans should work.

We tried to remove it. One of the links - and er, thanks for that link, I was sort of panicking and didn't think to do that. - I clicked there said to remove it with an antivirus or anti spyware, but we already did that. And it still came back.

Aand it looks like my account is now affected too.

Time to get our computer geek friend. -.-

EDIT: False alarm, that was a random popup. Though, it does look like we need to get our computer geek friend over; we had something like this last year and still have no idea where it came from. Thanks for the help, Kay.

EDIT2: Okay, whoever the hell wrote that program had better fry in hell because now I've got it!

What anti-virus system do you have in place?

We have AVG, Ad-Aware, and some anti-spyware program that I can't remember the name of. AVG catches it just fine when it does anything worse than trying to scan the computer (because it freezes itself, somehow) but it keeps on coming back for some reason.

Second question, what browser are you guys using?

some anti-virus softwares can detect it, but cant delete it, i would check if AVG can even remove that type of virus

I use both Firefox and Internet Explorer, though IE more than FF.

The problem appears to be solved; Mom was tinkering on the comp today and found something running called 'peepee##.exe' (can't remember the numbers right now) and shut it down and deleted it. So far, so good, but IE did a weird pop-up saying it had issues and needed to shut down before I even turned it on. Though that may have just been from when mom was scanning the computer.

I think everything's okay now. Er, thread close please? I feel bad about wasting time for you, Kay.

make sure you still run a scan. it might have another program that can cause it to reopen, i would also reformat your PC to wipe unneeded information off it.

Steak, if there was something in my computer, it would've popped itself up twice. It was one of those You Must Scan Your Computer!! type of things and it doesn't like hiding very much.

AHAH!

Then download and run Spybot Search and Destroy. Having both this program and AdWare will kill almost anything. Run it regularly.

This is from an old ISP Help desk person

yeah, spybot search and destroy is a good free program.

I use the avira anti virus and spybot myself.

I've heard that IE has security problems, presumably because most viruses are designed to get around it. I'd suggest using an alternative browser, but with the correct anti-virus software it shouldn't be necessary. Being careful with browsing and downloading should help as well, but there are times when even perfectly respectable sites can give you a virus (or more specifically the ads on them, such as what happened here a few days ago).

A lot of these viruses can be stopped with No-Script and Firefox. No-Script lets you select what scripts/flash things you want to run, and which ones you don't.

It was popping up even on Firefox though; my brother has never used IE.

Anyway, the problem's been solved; Mom downloaded that Spybot thing you mentioned, Kay, and the comp's been working great ever since. ^__^ Thanks!