Since my 1st computer(1st Apple in a case),later when Apple no longer supported the II series and I went to PCs, I have used many diverse protection programs. Sadly to say, no one program was sufficient to cover even 50% of spyware, pop-ups,firewalls, catch all virus, spyware etc. I used most of the free & pay programs some of which were AVG, Panda, Ad Aware, Bug Doctor Spybot Search & Destroy (the latter 3, used in conjunction with each other and kept current daily do a pretty FAIR job). Up until 3 or 4 months ago, I used both Norton & MacAfee. Now I have trashed them both, as I tried eAcceleration's STOP Sign suite through a free trial offer. Before the trial even ended, I signed on with them for MY LIFETIME, NOT the computers!! Buy a new computer, they will allow you to continue your subscription on the new computer!! Yes its a paid service and absolutely the best. They have several tiers of subscriptions, but the one I chose was the payment of $99.00 for LIFE and $10.00 for the CD! Figure out how much you pay for the original horrible Norton or MacAfee program & what the renewal costs are! Boo & Good riddance to Norton & MacAfee and their yearly renewal! The STOP Sign Suite gives you so much more. Example: Pop-up blocker; Firewall; Threat Scanner; Constant Virus Protection; E Mail (if you desire it, Speed-up your computer; LIVE help 16/7, auto help 8/7; when they see you have a problem they will create a custom cleaner especially for YOUR computer automatically; a game; plus more. A quick comparison: Norton Suite deep-scanned my files - they found 35,000 files. MacAfee deep-scanned and found 50,000 files. STOP deep-scanned and found ALL the files - I have 836,000 FILES!!! Yes, It takes several hours to deep-scan that many files, BUT are YOU satisfied with a <10% file scan? Not I! I want my 'puter squeaky clean! Its on DSL 24/7; updated automatically, and deep-scans after I go to bed. I can also use the computer while its running, albeit a wee bit slower. You can also suspend it & it will go back where it left off. Its EASY to set up and start-up!
I use XP Pro on (HP)an AMD Athlon XP Processor 3000+ Board; 512 mb DDR SDRAM Memory, soon to be 1 (or 2) gig; 160 gig HD; Back-up 360 gig external USB Hard Drive. I have been building\upgrading\repairing PCs free for friends since 1989 as a hobby. This STOP program really works!
The 3 programs I mentioned above (that I use in conjunction with each other) I still use during the day when I don't want to use STOP and I use them for quick checks. Hope this helps you. Try their trial offer.