Linksys713

I wouldn't use P2P software period, I see it as a security risk. But if I really had to choose I'd say utorrent. It's small, fast, easy, full of features. I heard a couple other torrents were decent like bitcomet but I've never used it before. I wouldn't use limewire period, I don't trust it.

I've tried alot of anti-virus software such as Zone Alarm, Bit Defender, and Mcafee. But right now I'm using Kaspersky anti-virus and it seems to be working the best for me. Detects alot more than the others did, scans faster, and it has very good active scanning. I really like how often it's updated and the easy interface it uses.

I found an interesting website while I was looking for a better anti-virus. It's called virus bulliten and it tests anti-virus software.
Virus Bulliten

If anyone is also interested theres a site that tests personal firewalls too.
Matousec

I've never used Opera before, if it's the fastest I should give it a try.I use both Google Chrome and Firefox 3, but I think Chrome is better than Firefox. Chrome seems to be a lot faster and doesn't have all that annoying clutter. Still both are great browsers.I use Internet Explorer sometimes. Internet Explorer 7 was good, but IE 8 is really getting on my nerves. They have a lot of annoying bugs to work out before it's ready. Every now and then when I close IE it starts opening an infinite amount of new tabs and you have to end the process to stop it.

I use KAV 2009. I just bought it yesterday, it works great. I haven't had any problems since I installed it. I used to use Bit Defender but after installing I got a BSOD.

If it's any help you can check up on the top anti-virus companies at virus bulletin.
Virus Bulletin