How to solve PS/2 keyboard and mouse not working after Windows 10 update

The PS/2 (Personal System/2) port is a 6-pin mini-DIN connector used for connecting keyboards and mouse to a PC compatible computer system. It was developed by IBM. PS/2 is now considered a legacy port, but still PS/2 ports continue to be included on many computer motherboards. Sometimes after the Windows 10 update the connected PS/2 keyboard or mouse connected to your computer no longer work. This is one of the annoying issues with Windows 10 update.

Solve PS/2 keyboard and mouse not working after Windows 10 update:

1. Plug your PS/2 keyboard or mouse in the PS/2 port.

2. Type Regedit in windows search box. and open the Registry Editor.

3. Now navigate to below in the registry editor:

HKEY_LOCAL_MACHINE > SYSTEM > CurrentControlSet > Services > i8042prt


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4. Then right click on “Start” entry and select Modify. it will open the editing field.

4. Change the value to 1 and click OK.

5. Close the Registry Editor and restart your pc. you are done. It will now work in your pc.

i8042prt is the function driver for PS/2-style keyboard and mouse devices for Microsoft Windows 2000 and later system. In some systems after the windows update it will change to value 3. Just change it to 1 and restart your pc.

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2 Responses

  1. Joe Frankel says:

    Thank you for posting this solution! Exactly the information I needed.

    One suggestion though: since the PS2 keyboard won’t be working at the start, it would be helpful to include instructions to enable the on-screen keyboard since you have to type in “regedit” somehow. That was my problem, I didn’t know about the on-screen keyboard, and I didn’t have any other keyboard available.

  2. Alan says:

    With value 3, the keyboard combination Ctrl+* stopped working shortly after start-up. With value 1, that combo no longer works at all!

    Time to get a USB or Bluetooth keyboard?

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