In case you just upgraded to Windows 10 and found windows 10 start menu not working, here are some effective ways to help you fix it. Follow the steps below.

Note: Before you use the following methods, you must first create a system restore point, only for unwanted errors.

Step 1: Download Microsoft Start Menu Troubleshooter

Step 2: Scan and repair corrupted Windows files

Step 3: Create a new account

Step 4: Update your computer

See explanation here: https://ideskplus.ng/windows-10-start-menu-not-working/