When I was running WinME, I had an occasional lockup... once a week or so. Switched to Win2k, and everything is great... Had a power problem last week that locked both systems, but other than that Nada... I switched OS's not because of lockups but rather, because of Memory usage, WinME is dreadful... Everytime I started a game, the memory ussage would go up, but when I stopped the game the memory usage would go down, but not to pregame levels, and it wouldn't until reboot... Win2k is much better...