Windows Start menu not working Or making it impossible to use the Search feature, after windows 10 update?

While clicking on it, a loading sign will appear for half a second but It wont do anything.

And then after sign in again find out if this helps.

Temporarily disable Antivirus software If you have installed.

Check and confirm your system has the latest windows updates installed.

Re-register Windows 10 start menu

You may be able to correct this by re-registering the package.

A number of users report Start menu issues were resolved after theyvecreated the new administrative account.

check The Start Menu problems should be gone.