Plug the purple PS/2 connector into the matching purple port on your motherboard. Boot up your computer. Step 2: Manually Add the Hardware Driver

The processor registers the keystroke instantly, rather than waiting for the next USB polling cycle.

Manually update the driver: In Device Manager, right-click the PS/2 keyboard entry and select "Update driver." Choose "Search automatically for drivers." If that fails, uninstall the driver completely (checking the "Delete driver software" box) and then restart. Windows will reinstall a fresh copy of the driver on the next boot.

This is the single most effective fix for driver-related issues, as it forces Windows to reinstall a clean copy of the Standard PS/2 driver.

Windows 11 is designed for modern, Plug-and-Play (PnP) USB devices. PS/2 devices, however, are not natively "hot-pluggable." Plugging in a PS/2 keyboard while the computer is running often results in Windows failing to detect it, requiring a system restart. Additionally, if the (the driver for PS/2 ports) is disabled in the registry, the keyboard will not work at all.

How to remove and reinstall the keyboard driver on a Windows PC

Look for settings labeled , PS/2 Port Controller , or Super IO Configuration .

Enabling PS/2 keyboard support on Windows 10 or 11 - Knowledge base

Click , ignore any hardware compatibility warnings, and reboot. Step 3: Disable Windows 11 Fast Startup

Disable the PS/2 driver in Device Manager: Right-click "Standard PS/2 Keyboard" -> "Disable device." Alternatively, in Registry Editor, navigate to the i8042prt key and set Start to 4 .