If you suspect that cleaning the Windows Registry has caused a problem with the functioning of your system, you can use your registry backup file to restore the original registry and reduce interference with your system.
To restore the original registry, perform the following steps:
Step 2. Click on regedit to open the Registry editor
Step 3. Select File > Import from the Registry Editor menu bar to activate the Import Registry File screen, and then locate your registry backup file
Step 4. Click Open to activate the following confirmation dialog box:
Step 5. Click OK to complete the restoration of the registry backup file