Open Run box,in the search box, type regedit, and then press Enter. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
In Registry Editor, locate and click the registry key or subkey that you want to back up.
Click File \Export
Select the location where you want to save the backup copy to, and then type a name for the backup file.
Click Save
Restore Registry
Open Run box,in the search box, type regedit, and then press Enter. If you are prompted for an administrator password or confirmation, type the password or provide confirmation.
In Registry Editor,click File \Import
In the Import Registry File dialog box, select the location where you saved the backup copy to,click to select the backup file, and then click Open.
In this tutorial I will show you How to backup and restore registry
