Just to answer a couple of your other questions:
“Cisco” is one of the big players in networking equipments and technologies (think Microsoft for a hint at a similar animal) so no, just the name doesn’t mean a lot. But if you look closer around the box or flip it over, you’ll probably see a model name/number which might clear the mystery up.
Unless you intend paying for an antivirus subscription (in which case you can stick with whatever you feel you like) I recommend going a free antivirus; that way you won’t have to deal with annoying warnings that your definitions are out of date, on a constant basis. Avira and Avast are among the best free ones.
As for listing a name of a copyrighted software, well, it never ceases to amaze me how people “brag” online about stuff they actually steal (sic!).
You need to be aware that material which is copyrighted is actually illegally found free-of-charge online in most of cases (there are some notable exceptions though). I’m not advocating the case of the copyright holders here, just refreshing everyone’s memory on the current legislation.
So, it’s more or less like bragging in the vicinity of the police precinct about the “job” you did on the jewelery store downtown, a couple of days ago. Not a very smart move, eh?
Think of BitComet (or any other BitTorrent client) as of a tool. It helps people share stuff in the BitTorrent network. **The BitTorrent client, the protocol and the BitTorrent Network doesn’t ****know ****and doesn’t ****care **what stuff it transfers (think of the mail system).
It can be used by companies or software creators to easily share and distribute their stuff at low costs (no high-end sever costs for hosting the files involved since the load is supported by the swarm of users). You can find and download most Linux distributions by this means, which is cheap and effective for everybody.
It can be used to share LOTS of legal stuff (think personal made video, music and images, also think artists who want to freely distribute their creations to promote themselves, think thousands of classic art works, books or music pieces which are NOT any longer under the copyright law’s jurisdiction but part of the universal cultural heritage. And lots of other uses.).
But just like any other tool it can be used to do some illegal stuff (i.e. sharing/downloading copyrighted material such as movies and music that wasn’t released for free access to the public).
Whatever you choose to do with it it’s your decision and responsibility; just make sure that you know at who’s door the guys in black suits will be knocking. B)
I’ll leave the rest of the train of thought to you… Be safe and happy torrenting! 
**