I just setup a new Windows 7 computer and if I use the keyboard, especially the Ctrl/Alt/Shift keys, the mouse freezes. The keyboard is fine (as a matter of fact, my mouse is frozen as I write this...). The only solution is to shutdown and restart the computer (rebooting doesn't get it done). This happens on the login screen as well.
The mouse and keyboard are USB and they are running through an Aten HDMI KVM.
I've updated all the drivers, done all the windows updates, checked BIOS to see if there were any settings (and my fancy BIOS actually has mouse support and it doesn't freeze there). No joy. Any ideas?
UPDATE I've narrowed it down to the KVM. It is an Aten CubiQ 1794, which has USB 2.0 ports. If I plug the keyboard and mouse directly into the computer, they work. If I use the KVM, the mouse freezes. The Mobo (Asus Maximus VII Hero) has both USB 3 and 2 ports. I tried both with KVM and both have same issue. I also tried to change the BIOS EHCI setting and the issue occurs with it is enabled and disabled. So, this seems to be a USB compatibility issue. Any ideas on how I might solve it?