Before we proceed on to do a backup of your registry, I would advise you to run a registry cleaner program to clean up your registry. This is to ensure that all the useless registry entries left by third party software are removed and you have a lean mean backup.
Backing up your registry
Once you have cleaned up your registry, follow the steps below to backup your registry.
Press Windows key + R Type regedit
The registry window will appear. At the top of the list, select “Computer”. Go to File->Export.
Choose a location to save your reg file.
That’s it. You have just backup your registry. Remember to keep this backup reg file in safe place.
Restoring your registry
In the event that something happened and you want to restore your registry, simply double-click on the backup reg file or go to File->Import in the registry window. Note: The above steps will work for Windows XP and Vista as well.