This article was previously published under Q104072
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If the PS/2 Mouse Port driver, I8042PRT.SYS, is either disabled withControl Panel or removed from the WINNT\SYSTEM32\DRIVERS subdirectory,the keyboard becomes inoperative.
The PS/2 Mouse Port mouse is supported on both x86-based andRISC-based computers. It connects to a round, 6-pin connector that isbuilt into the computer as the Intel 8042 (or Intel 8742) auxiliarydevice. The keyboard is also connected to the Intel 8042, and issupported by the same driver.
The PS/2 mouse driver is normally set as System in the Devices portionof Control Panel. If it is disabled and the keyboard is inoperative,use the Last Known Good Configuration menu on startup of Windows NT torestore the driver and the keyboard.