I had Trend Micro which I loved (my computer never knew when it was doing its 'thing' and never slowed or anything) but when it expired, the cost had gone up for renewal so I uninstalled and tried something called "ES ET" and the trial worked beautifully but when I actually purchased it - it was such an interference that for a bit, I thought my computer was dying. I found no resolution through communication with ES ET, so I uninstalled and got my money back. Then I got an email from Trend with a coupon so I'd get my program back for only $19.95, so I jumped at it, installed it - except it refused to install - I kept receiving the error message that my Windows was out of date (it isn't - I double-checked everything from IE to XP) so it wouldn't install. I can't reach them due to the holiday, but if my suspicions are accurate (that they want me to pay to upgrade my XP pack - which I find unnecessary - right? *looks around at friend for answer*) I'll be getting a refund tomorrow. So anyway, then I tried one called "Bulldog" a couple of days ago - and all I can say is - DO NOT TRY IT. It's a bulldog, all right. Stubborn about slowing down your computer to a crawl - without notice - no matter how you set it up! So since that was a free trial (3 months!) - yep, I uninstalled. Today, I tried another recommended program (microsoft has a page of programs that are compatible with their system) called "E scan", which allowed a trial and PROMISED not to slow my computer down one bit. Can we say, "YOU WISH!"???? Oh, sure, it installed smoothly, ran a scan in very good time, found no viruses etc. but when it closed and I started to actually USE my computer, it was slowed down to a crawl. A very very very slow crawl. *rolls eyes* So again, I uninstalled yet another program.
Now I've had Norton in the past, but yes, every time it ran a scan, it slowed my computer = as did McAfee. SO. Anyone got a good virus program that, once residing in my computer, won't interfere with my computer's speed? Anyone? Bueller?