How To Backup the Registry in Windows 7

If you're planning on making several changes to the registry in Windows 7, backing up each individual registry key probably isn't the best idea.
Luckily, there's an easy way to export the entire Windows 7 Registry.
This way, after backing up the registry in its entirety, you can make changes to several registry keys and then be able to restore them all at once if necessary.
Follow these easy steps to backup the Windows 7 Registry.
Note: The steps below require working with the Windows Registry in Windows 7. Making changes other than the ones described below could cause serious problems.

Difficulty: Easy

Time Required: Backing up the Windows 7 Registry usually takes less than 10 minutes

Here's How:

1. Click on the Start button.
2. In the search box, type regedit and hit Enter. The Registry Editor program will open.
3. Navigate to the very top of the registry key branches until you reach Computer.
4. Highlight Computer by clicking on it once.
5. From the Registry Editor menu, choose File and then Export....
6. In the Export Registry File window that appears, choose a location to save the registry backup file to.
   Note: I usually recommend choosing the Desktop or the Documents folder. Both are easy to access if you run into problems later and need to use the file to restore registry data.
7. Locate the File name: text field and enter a name for the backup file.
   Note: This name is for you to remember what the exported registry file is for. Since you're backing up the entire Windows 7 Registry, I would recommend calling this file Complete Registry Backup or something like that.
   
8. Click the Save button.
   A Registration File with an REG file extension will be created in the location you selected in Step 6 and with the file name you chose in Step 7. Continuing the example from the last step, the file would be named Complete Registry Backup.reg.
   
9. You can now make the changes you need to make to the Windows Registry.
10. If after making the registry changes, you realize that they did not give you the results you were looking for, you can simply restore the entire Windows 7 registry back to the point at which you backed it up.