How To Backup And Restore Registry
Back up the registry manually
Select Start, type regedit.exe in the search box, and then press Enter. If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.
In Registry Editor, locate and click the registry key or subkey that you want to back up.
Select File - Export.
In the Export Registry File dialog box, select the location to which you want to save the backup copy, and then type a name for the backup file in the File name field.
Select Save.
Restore a manual backup
Select Start, type regedit.exe, and then press Enter. If you are prompted for an administrator password or for confirmation, type the password or provide confirmation.
In Registry Editor, click File - Import.
In the Import Registry File dialog box, select the location to which you saved the backup copy, select the backup file, and then click Open.