Forgot bit locker pin, forgot bit locker recovery key, 5 Easy ways to fix

There are several reason why Windows defender not opening in windows 11. Bellow you can see the number of solution. one the either solution will definitely help you.
1. Very first Restart your PC and check it if it is working fine.
2. Go to setting and check for the update and update your PC to the latest version.
3. If you are using any kind of 3rd party antivirus, try uninstalling it, it might be causing the problem.
4. Go to setting page. On the top choose system, right hand side click on Reset this PC to Reset. This will reinstall fresh windows into your PC and it might fix your problem. All the inbuilt software along with window defender will be reinstalled.
5. Go to setting page. click on Apps, on the right hand side click on installed apps. search for windows security, click on 3 dots (...) beside windows security. and choose advance option. Click on Repair, if it do not work, come back to same place and Reset it.