Greetings!!!! I hace been running WinXP Pro x64 since 12/05... At that time, only 2 AV (x64) apps available .... Avast Home is free-use and works very well..... http://www.avast.com/eng/programs.html Wife bought me AMD64 X2 and 2Gb RAM....FreeLancer CrossFire 1.56 runs GREAT!!!!Updating to 1.62 soon... Recently got TV function back.....X64 is SWEET....