First Tip, if you are using Windows 8, upgrade to Windows 8.1
Windows 8 has enough serious technical issues that users of this operating system are advised to upgrade to Windows 8.1.
Useful Keyboard Shortcuts for Service Techs
Windows Key + E = Launches File Explorer both from the Desktop and the Start screen.
Windows Key + R = Launches the Run dialog that you can use to run programs or commands.
Windows Key + F = Launches the Files Search. You can use this to search for files on your PC and OneDrive.
Windows Key + W = Launches the Windows Settings Search. You can use this to search for specific operating system settings by typing in certain keywords.