I just read the virus thread and thought i would separate the "2" different discussions going on there. I favor Norton Corporate Edition because it seems to have been the least trouble for me on many machines (me being an OEM and all). Although McAffee can run great if you only install the bare minimum. On both you should try to stay away from all the stupid "crash guards" and "anti fragmenters" etc. Those extra's are what really f(*k a computer up! If your computer is crashing, how is another program going to help, you need a solution not a bandaid. Just the basic scan set, email scan, and keep those defs up to date and you should be fine.