Hi,
There are several reasons why you are experiencing this problem and that's what we are going to figure out. This type of issue normally happens when there's a hardware failure or software change made on the computer prior to this concern. Before we proceed with the troubleshooting steps, we would like to know more about this concern. Kindly answer the questions below:
- What troubleshooting steps have you tried so far?
- Are you using an external keyboard? If so, have you tried using a different keyboard to isolate this issue?