keyboard locked

If Mouse keys are turned on, turn them off.

http://support.apple.com/kb/TS1297

Reset PRAM. http://support.apple.com/kb/PH4405

Reset SMC. http://support.apple.com/kb/HT3964

Choose the method for:

"Resetting SMC on portables with a battery you should not remove on your own".

Best.

Press option key 5 times.

If this does not help, contact Apple.

Best.

Yes! Option key 5 times worked!

Thank you dominic23!

My keyboard was locked in the middle of a Numbers spreadsheet. So I turned off my computer. Now I'm at the sign on screen and I can't sign in.