I have made a habit of asking some really dumb and basic questions on these forums - so why change now?!? At least it'll be simple to answer and a short thread!! I have recently bought a new PC which came bundled with PC-Cillin 2002. I am much more security aware since joining this forum and have now sourced much security software (see list below). I have installed a trial version of NOD32 which recommended removing my existing AV software (which I did). I have also read that more than one AV installed may cause conflict. Reading the forums I notice that many of you have two, three and even four AV programs installed!!! Question - Can I run more than one AV program without detriment to either? I would like to run NOD32 and PC-Cillin until my licence expires - at which point I would probably install a freebie such as AVG alongside NOD. For info I have the following security software installed - would also appreciate any general comments here: Zone Alarm (Free) - (Sygate -Free ON TRIAL) NOD32 (ON TRIAL) TDS-3 (licenced) Port Explorer (Licenced) WormGuard (Licenced) RegProt SpywareGuard SpywareBlaster Spybot S&D Adaware MRU Blaster P.S This forum is a great place to learn!