Originally Posted by MindoverMaster
Chipset drivers do not include or touch your mouse. Try reconnecting it, refresh drivers, use a different mouse, different port if USB.
It -might- be effected, if the USB is part of the chipset. Depends on the board I guess? I'd see if you can find a PS/2 mouse laying about and see with that. Alternatively, if you can survive with just the keyboard, see what happens if you do it with -no- mouse connected. It couldn't hurt, anyways.
I think, once upon a time and with some shady hardware, the system started to act funny after such an update. In my case, disabling legacy USB mouse support in the BIOS seemed to fix it. This was a fine tradeoff, as legacy USB mouse is not really needed. Keyboard, yes... mouse, generally not.