For windows maybe you could try utorrent it is a nice bittorrent client and it uses little system resources a opensource solution for limewire is frostwire whichs is addfree. http://www.utorrent.com/download.php http://www.frostwire.com/
sry if i came on too hard about the McAfee vs Norton thing. i havent tried the newest Norton. i have compared them nearly a year ago. i used to like Norton back in the 90's though and i probably would have liked it now... if i used Windows. come to think of it, i DLed something a few days back that was a really nasty trojan. it said that it was a password list to a bunch of websites but i first noticed that it was a ".EXE". i opened it with a development program and wow. good thing i dont use microsoft. there is always a threat when downloading something. be safe
Yea-Norton warns me before I open any exe. files-I feel completely safe with these guys-I have never had a virus that they didn't catch and destroy-McAffe I had problems with-Maybe some day their will be a virus free internet completely