I too have experienced this exact same issue on two different computers, one of which is literally only a day old.
I cannot speak for the long-term reliability of this method, but here's a way I found to (at least temporarily) fix the broken search bar without having to kill explorer.exe in Task Manager or having to use PowerShell commands on my own computer:
- Open a folder, any folder (doesn't matter which)
- In the Ribbon, click on View and then Options
- When the Folder Options window appears, click the View tab
- Scroll the "Advanced settings" list about halfway down
- Look for the setting "Launch folder windows in a separate process".
a. If it is NOT checked, then click the box to check it
b. If it IS checked, then uncheck it, click Apply, and finally re-check it
- Click Apply, and then OK.
This seems to have worked for me, but like I said only time will tell if the problem comes back or not.
Worked for me! Will monitor to see if it continues.
Thank you #TorinDarkFlight