i can be on my computer for a few hours and all is fine with the keyboard. I take a break and come back to the computer and the keyboard has
switched to all numbers, so if I press any letter
it show numbers . any help is this a virus
Run you antivirus scans if you have to ask.
Are you going into sleep/hibernate mode when idle ?
Any screen savers active ?
Software, OS, and drivers updated to current ?