A PS/2 keyboard and mouse should work on the login screen and you should be able to sign in to your system. After doing that, you can reinstall your USB Hub and USB keyboard and mouse drivers. 6 ...

A faulty keyboard driver can render your keyboard inoperable in Windows 7, ... and round PS/2 port keyboards should be connected to the similarly-sized port that is labeled with a picture of a ...

Right-click on Standard PS/2 keyboard and choose the Update driver option. You’ll be required to restart your system once the update has been successfully completed.