If Pin to Start is not working or is missing on your Windows 11/10 computer, then use GPEDIT or REGEDIT to fix the issue. You may also re-register the Shell32.dll file and see if that helps. Before ...
If you find that your Libraries folder in Windows 11/10 opens on startup, then you may want to try some of these troubleshooting steps. These are just things that come to my mind, and you may try them ...