Keyboard not working on machine. Computer does recognize that it exists. number lock key is lit up but no other keys work. Keyboard is fine when i connect to another PC I Think I need new driver installed for a standard ps/2 keyboard because device manager tells me the driver is either corrupt or missing, I went to windows update but no luck, i tried to find the driver online but everywhere i go a scan program is for sale and i cant just get the basic driver without purchasing a program. Any suggestions?