Originally posted by GrayWolf
Have you tried using another PS/2 mouse with the computer? Also make sure you connect the PS/2 mouse to the computer while it's off.
Why don't you want to use the mouse via USB?
You can actually connect the mouse while the system is on (I have a KVM switch which I use to switch between systems while they're on). But yes I start up the system with the mouse plugged in but no go. Tried a different mouse and it's the same thing, (this mouse works fine with my other system on the KVM). Like I said, it worked before I installed some updates after the installation of SP1 (I think I said). Mice on USB=Suck period. I never ever ever recommend mice being used on USB unless there is no PS/2 port. Using mice on USB is like having a wireless keyboard+mouse setup, they just suck no matter how you look at it.