What is the showing in Device Manager (e.g., Code 10, Code 19)? Are you using a native motherboard port or a USB adapter ? What brand and model is the keyboard?

If you are trying to resolve a specific issue with your setup, please let me know:

Visit the official support page for your motherboard (e.g., ASUS, MSI, Gigabyte, ASRock).

Sometimes, ghost drivers cause conflicts.

Proprietary hotkey or input software from the OEM may conflict with the generic Microsoft driver.

Hold down the Shift key while clicking in the Windows Start Menu.

In Windows 11, this driver is part of the standard HID (Human Interface Device) architecture but operates differently than its USB counterparts, largely because the PS/2 bus relies on hardware interrupts rather than the USB polling method.

This is the primary troubleshooting flowchart to follow:

If your PS/2 keyboard stopped working after upgrading to Windows 11, or if you see a yellow exclamation mark in Device Manager, this comprehensive guide will help you install, update, and troubleshoot your driver. Why Use a PS/2 Keyboard on Windows 11?

Right-click and choose Update driver . Select Browse my computer for drivers .