One reason I tried NOD32 was because I heard how little it impacted system performance. Another was the Virus Bulletin Reports and also the problems I was having with McAfee Tech Support and SP2 (since resolved). I ran PCMark04 on a 1.13 Ghz P3 laptop w/ 384 MB of RAM. Now, NOD32 only used about 16 MB of RAM will McAfee uses about 33. However, when testing PCMark04, I get the following results: No AV: 1632 NOD32 (maximized settings per Blackspear's thread): 1602 McAfee: 1632 This actually matches the results I read here (from PC Magazine) which said McAfee produced 0% degradation during their testing (I didn't believe it until I tested it myself!). http://reviews-zdnet.com.com/PC_cillin_Internet_Security_2004/4505-3536_16-30588581-5.html?tag=top I must say I'm disappointed in NOD32 and impressed by McAfee. Yes, I understand the ActiveX problem w/ McAfee, but still ... has anyone else done performance degradation testing w/ NOD32?