Windows 10: how to use fn lock

i activated fn lock a year ago and now i have disabled it somehow and i dont know how to enable it back i am using toshiba laptop

:)

 

Laptop FN Lock?

Are you sure it's not the num lock rather than FN lock? Sounds like num lock to me.

 

Laptop FN Lock?

no exist? it's in all the screenshots.

that is what fn does, num lock turns the number pad on or off yes - but it only matters for a dedicated number pad. those are normally arrows when turned off.

 

Laptop FN Lock?

My boss has a Sony Vaio VGN-AR190G, it seems like FN lock is on, because when he types certain letters that have numbers when pushed with the function key, it types numbers instead of letters. I do not even see a function lock key on this keyboard. I'm not really sure what to do. I've tried googling the issue but haven't come up with a solution. There was a wireless keyboard plugged into the laptop for awhile, I checked that one for a FN lock key and it doesn't have one either.