This happened this morning. There is a long delay on the keyboard. I have to press and hold a key for a few seconds for it to register.
I have done the following:
1. unplugged the keyboard
2. tried another usb port
3. tried another keyboard
4. uninstalled the keyboard driver then allowed windows to auto discover
5. verified sticky keys was not checked
Also, if I remote into the machine with team viewer my remote keyboard works fine.