I just installed SP2 and the Rise of Nations expansion...with locked up the system. After the reboot, I started it again, and it locked up again. I left, after telling it to shutdown, only to find it still hung up with the ending program message. Hit the reboot button on the case only to have it come up telling me that either there is a keyboard error or no keyboard. My wireless usb keyboard (Logitech mxduo) has always worked before...and USB support had been turned on in the bios. Any ideas as to what could be happening? I kinda need this for some of the programs my classes require (some circuits classes and a digital logic class).