My brother's PC is eating my megahurtz

My brother has a PC that used to be great. Then he installed Limewire and downloaded five hundred billion songs and, I'm pretty sure, a few hundred viruses. It's gotten to the point where everything is slowed down to a snails pace. My ghetto old computer runs faster than his. And for some reason Limewire is the only computer that can access the internet. Or so it seems. I think there are a few viruses that are eating our bandwidth because periodical the internet will crap out entirely for no real reason. Is there someway I can check to see what programs are accessing the internet?

You may need to explain in excessive detail because I'm not too computer savvy.

You should be able to see what programs are making/accepting network connections by going to the CMD prompt (Start | Run | type CMD, press Enter) and typing "netstat".

Before doing this, do your best to close any programs that are open (web browsers, IM programs, P2P software) so that those don't clutter the output.

This will tell you what sites are being connected-to and on what ports.

>>1
Stop using Internet Explorer

Songs don't contain viruses

>>3
| Songs don't contain viruses

Yes, but executables named to look like songs do. Limewire is rife with them, along with just about every other well-known P2P network.

get a virus scanner. doesn't matter what, just get one. it's better than nothing.

>>4
That only affects:
- Retarded lusers
- Retarded lusers who keep extensions hidden in Windows (retarded luser feature)

>>4
Yes, they do... there were winamp mp3 exploits, just to name ONE of them.