It looks like Microsoft has once again shipped dodgy Windows 11 updates, with reports suggesting that the two latest cumulative updates have been causing serious issues with the Start menu.
The updates in question are KB5015882 and KB5015814, and it looks like they’ve introduced a bug which causes to Start menu to disappear when you click to open it.
That’s a pretty major issue, considering how integral the Start menu is to Windows 11, and it’s an unwelcome reminder of the dark days of Windows 10 updates, where for a time Microsoft was bringing out updates that seemed to cause more issues than they fixed.