Export All of the Registry as a Backup in Windows 7

How to export all of the current registry to a .reg file as a backup in Windows 7:

Open the Start menu --> type regedit in the search box --> Press Enter(If prompted by UAC, click on Yes) --> On the menu bar of window, Click on File , --> Export --> Select where you want to save the .reg file --> type in a name for the .reg file --> click the Save button.