How to Fix Start Menu Not Opening

Things you'll need:

1. Powershell
2. Internet
3. Time

Step 1: Powershell

In PowerShell, type the following:

Get-appxpackage -all *shellexperience* -packagetype bundle |% {add-appxpackage -register -disabledevelopmentmode ($_.installlocation + "\appxmetadata\appxbundlemanifest.xml")}_

Wait for a new prompt before moving on.

Step 2: Reboot

Your Start Menu should work afterward.