I'm running XP Pro 64 on this machine (dual boot with 32 bit). I found drivers for most of my main hardware no problem (Promise Raid has a small glitch that brings up the 'Found new hardware' wizard each time I boot) and the few issues I've got with it while irritating aren't critical at the moment. - Couldn't find drivers for my Brother laser printer or Canon Inkjet, so I have to print from one of the other machines - Wacom tablet drivers cause complete system freeze, so pressure sensative features of tablet are out. - Can't find any 64bit antivirus software, so extra vigilance required against infection (ditto for anti spyware) - Activesync for my PDA requires the version 4 beta, release versions are only partially functional - No driver for my digital camera, but I normally transfer files using a USB card reader anyway. Media Player IS included in the release version and I've not noticed any missing CODECs yet (divx, mpeg2, xvid, etc all work fine out of the box). It also ships with both 32 bit and 64 bit versions of IE and windows explorer, although I've not HAD to use the 32bit versions of either yet. So far non of the mainstream applications I've tried has had any problems. The few issues are with things that try to access hardware driver layer, intall Explorer extensions or control panel applets. My key applications (Vue Infinite, Poser 6, Photoshop CS, Firefox, Thunderbird, Open Office, Nero 6) and most of the smaller helper utilities I've tried all run as perfectly on x64 as they did on x32. I would advise anyone considering the switch to check out PlanetAMD64.com (even if you have a 64 bit Intel processor) to make sure drivers are available for all your critical hardware. Sometimes the location of x64 drivers is not immediately obvious on the manufacturers' web sites, so a central repository is very helpful (unlike the Microsoft site) -- Mark

Mark