It could be either a hardware or software issue. Here are a few things to try:
# ***Restart your computer:*** A simple restart can sometimes fix software glitches that might be causing the keyboard issue.
# ***Clean your keyboard:*** Dust and debris buildup under the keys can interfere with their functionality. Try using compressed air to clean your keyboard.
# ***Update your keyboard driver:*** Outdated drivers can sometimes cause keyboard problems. You can update your keyboard driver through Device Manager.
If none of these steps work, then it's more likely a hardware issue and you might need to replace your keyboard.
***To check if all your keys are working, you can try using a free online keyboard tester tool like bestkeyboardtester.com.*** This will help you identify any other problematic keys.