As we all probably did, I recently upgraded to Windows 10. I was really impressed with how greatly MSFT improved the search function from 7 to 8/8.1, however in Win10, the search function just did not work for me. Using some Google-FU, I was not alone and here is what I found it to fix it:

1. Kill the process ‘explorer.exe’ (Run PowerShell -OR CMD as Admin)

taskkill /im explorer.exe /f
  1. Navigate to this registry key, and DELETE it:

(I recommend using REGJUMP, it’s just sooo handy!)

  1. Launch ‘explorer.exe’ again

(You should find more stuff now, but still not all…)

  1. Make sure the ‘Windows Search’ service is running

  2. Run the following PowerShell command:

(Re-install / build Cortana…)

Get-AppXPackage -Name Microsoft.Windows.Cortana | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
  1. Last but not least, make sure your “Indexing Options” in the Control Panel are set correctly. I Made sure I selected the right disks and drives, and rebuild the index from scratch, that took a while…

  2. Enjoy your working and fast search! :o)