1 – Navigate to the registry key HKEY_LOCAL_MACHINE\System\CurrentControlSet\Control\Class\{4D36E96B-E325-11CE-BFC1-08002BE10318}
2 – Once you find the two folders, there is no need to expand them further (if you do, you’ll find folders labeled “0000”, “0001”, “Properties”, etc. — just ignore these).
3 – To fix the keyboard, click directly on the 4D36E96B-E325-11CE-BFC1-08002BE10318 folder (don’t expand it). Once you click the folder, you’ll see registry value files appear on the right hand side.
4 – The file you’re looking for is the last one in the group — the one named UpperFilters. Double-click on it, and a small box opens titled “Edit Multi-Screen”
5 – Once the Edit Multi-Screen box opens, you want to delete any information in the Value data: field (if there is any), and type kbdclass When finished, click the OK button.
6 – Reboot your system.