Satellite A135-S2326 (P/N PSAD6U-01800D), currently Cel M520 (T2060 - SL9VX) 1.6GHz, maxed at 2G RAM. Machine is slow with Vista, no XP Drivers. Recommendations for compatible upgrade CPU?
It should run fine - your lack of speed is probably due to a bad software configuration. Clean up your machine, and use msconfig to get rid of programs that start with Windows.