Hi,
It could have something to do with sticky keys.
- Go to Control Panel then look for Ease of Access
- Click on Change how your keyboard works.
- Uncheck where it says Turn on Sticky Keys and click OK.
If this doesn't work try checking the keyboard language if set correctly.
- Go back to Control Panel then look for Region and Language and make sure all tabs at set to United States.
- Click Apply when a change is made then try your keyboard again.