Try FN+num lock.

that did not work

Are you certain of the model number?  FE91S resolves to a Sony/Vaio system - not Dell.

Welcome to the Dell Community  @Malone33 

To better assist you, the members and I would need the exact model number of your laptop/desktop???

1. Go into your BIOS.

Power-on the system and start tapping the F2 key to enter System Setup.

2. In Windows:

Hold down the” Windows “key and tap the “R “key.

Then type msinfo32 and hit enter.

Best regards,

U2

PLEASE DO NOT POST ANY SERVICE TAGS!!!

I7FE9IS