I´m running Windows 8.1, and never had problems with my wireless mouse ad keyboard. But my keyboard has a real problem, and I tried with a normal PS2 keyoard. But it wasn´t recognized. I read, that when we use a USB mouse or keyboard, the PS2 is disabled. I tried the following: HKEY_LOCAL_MACHIE/CurrentControlSet/i8042prt and edited the value of "START" from 3 to 1. But it didn´t work. Is there another way to enable PS2 keyboards again?