Installed MCAFEE 90 day free TRIAL last night. Computer is noticeably slower now. I have HP with XP and FiOS 25/15 internet connection. Is this slowdown typical or should I look for a problem?As a rule I don't badmouth software vendors, but McAfee produces pretty poor products. I don't know which particular McAfee app you've installed, but I strongly suggest uninstalling it and trying a competitor's product (ANY competitor's product).Thanks,  the deed is done. What anti-virus do you recommend?There are so many good products out there. I'm a fan of Kaspersky for a number of reasons (for example, they update their definitions HOURLY as opposed to daily or weekly as most other vendors do, their online forum support is OUTSTANDING - as is their PHONE support, and their products are consistently ranked at or near the top of pretty much every reliable comparative evaluation I've seen). Other very good products (paid and free) include NOD, Avira, Avast, etc. Lot's of threads on other forums you might want to check out - not sure if I'm allowed to POST links here though.