If Cortana is not working after you upgraded your PC, open your Registry Editor and ensure that the value of BingSearchEnabled, as well as CortanaEnabled, is set to 1: HKEY_CURRENT_USER\SOFTWARE\Microsoft\Windows\CurrentVersion\Search Reset Windows Search and see if it helps you. Open Control Panel > All Control Panel Items and click on Find and fix problems with Windows Search to open the Windows Search Troubleshooter.
#Search windows 10 not working Pc#
Sign out and Sign in or restart your PC and see if the problem goes away. The process will restart automatically after a few seconds. In the Name column, right-click SearchUI.exe and then select End task when you are prompted to end SearchUI.exe, select End Process. In the Task Manager window, select the Details tab. Press Ctrl+Alt+Del, and select Task Manager. Microsoft has released Windows Start Menu Troubleshooter, which promises to fix the issue. When the services start afresh, you should be able to use the search without a problem.
Restating a computer can fix a lot of problems, and you should do this as the first step.