The main screen is divided into 3 main categories, "Computer," "Network," and "Web." The Computer section is the meat of the suite covering viruses, spyware and other malware.

I decided to purchase Norton Internet Security. What a step up from McAfee! I previously had Trend Micro which I didn't like as well. In addition, I didn't like their business practices.

My problem is it found 20 others that I do want to get rid of. So it gives me 2 choices, Exclude all of them from future scans or delete them all.

I'm sure it grabs some resources, but in today's era of high-powered personal computers, it's not a problem. I'm glad I bought it. Once you get this software it will let you install on 3 different computers. Haven't tested 64bit version, but I'm pretty sure it should work the same.

There is virtually no noticeable slow down (I have a gateway NV79 w/ an Icore5 processor, 4GB of DDR3, and windows 7). When my laptop is idle, the antivirus starts running diagnostics since resources are freed up - not when I'm actually trying to get some work or leisure done. When I manually disable the NIS software (just for comparison), my system flies and is back to normal! Obviously, the culprit is Norton Internet Security.

It's been so long since I got it so I don't remember anything about the vendor, but the product is great. I have been using Norton Internet Security since 2006. I do find the recurring message for removing tracking cookies a bit annoying, so I may change this setting if this happens too frequently. I installed in on my PC, Laptop and my daughter's laptop. I had some problems installing and it took me more than one try! Since I already had Norton I had to use the Norton removal tool. For the average user, NIS does its job well, without slowing down your PC much (yes, older versions prior to 2009 sometimes were bad on computer resources). I've seen very few false positive alerts with NIS, other than it flagging some very odd encryption programs (and it's easy to tell NIS to ignore specific files/programs). Another time I was seeing file-transfer slowdowns to a mapped network drive; support "chatted" me through a few exclusions, and the transfers went back to normal speeds. When I see NIS on sale here for around $36, I just go ahead and buy it for next year's renewal. Very secure. All in all, a great product!

I wouldn't bother with Windows own. I don't know if it's still true, but Diskeeper used to be the company that provided Microsoft with its basic defragger tool - basically a crippled version of the real thing, what marketing people call "aspirational" (it looks great on paper, but it doesn't yet or never will work).