The Microsoft regedit.exe Registry Editor contains many information and allows user to view and change system settings. Windows 8 comes with Metro UI Start Screen and desktop mode, but lack of a proper start menu. Here is a guide on how to open and run regedit (Registry Editor) in Windows 8 RT/pro.
* First press Windows + R keys on your keyboard, type “regedit.exe” into the dialog box, and click OK button.
* A User Account Control will ask you “Do you want to allows the following program to make change to this computer?” Click “Yes” to confirm that. Now you are able to access Registry Editor.