You can always try the virtual keyboard:
Click the"Start" button , click "All Programs", then "Accessories", "Ease of Access", and then clicking "On-Screen Keyboard". This keyboard will allow you to select the wanted keys. https://www.youtube.com/watch?v=uLgHKyYkaLE
Does these letters work in another program such as Notepad? If not, then replace your keyboard. Or check with your antivirus.
You can always try the virtual keyboard:
Click the"Start" button , click "All Programs", then "Accessories", "Ease of Access", and then clicking "On-Screen Keyboard". This keyboard will allow you to select the wanted keys. https://www.youtube.com/watch?v=uLgHKyYkaLE
Does these letters work in another program such as Notepad? If not, then replace your keyboard. Or check with your antivirus.