Usually, it’s never a good idea to edit the Registry, because the database contains low-level settings necessary for the OS and certain apps to work correctly.
However, sometimes, you may need to modify the Registry to change specific system settings, and if you forget to create the backup, or during an installation of faulty update the Registry gets corrupted, you can still recover Windows 10 using the secret Registry backup.
You probably didn’t know this, but the OS keeps a backup of a working Registry for recovery purposes, which you can use to manually restore your computer to a working condition when you don’t have a backup.
How to manually restore the Registry
To manually restore the Registry on Windows 10, use these steps:
Start your PC with the Advanced startup options.
Click on Troubleshoot.
Click on Advanced options.
Click on Command Prompt.
When your device starts in Command Prompt, it’ll start on
X:\Windows\System32. Now you need to move to the drive letter where Windows is installed. While the operating system is installed on
C:\, when you boot your computer on recovery mode, this drive letter changes to something else. However, in most cases the drive letter is
D:\. Type the following command to enter into the correct drive where Windows is installed and press Enter:
Type the following command to verify you’re in the correct drive and press Enter:
If you see the Windows folder, you’re in the correct drive letter, if not, go back to step 5 and try another letter.
Type the following command to enter into the System32 folder and press Enter:
Remember to change D in the command with the correct drive letter for your scenario.
Type the following command to create a folder to temporary backup of files on the config folder, which also happens to store a copy of the Registry, and press Enter:
Type the following command to create a temporary backup of the files in the config folder, and press Enter:
copy config configBak
Type the following command to move inside the RegBack, which contains a backup of the Registry, and press Enter:
Type the following command to verify the content of the RegBack folder and press Enter:
dirWarning: After running the
dircommand, the size of the files (SYSTEM, SOFTWARE, SAM, SECURITY, DEFAULT) should be similar to the ones you see in the screenshot. If any of the files shows 0, do NOT continue as you won’t be able to repair your Windows 10 installation and your device may stop booting.
Type the following command to copy the files from the RegBack folder to the config folder and press Enter and Y on every question to confirm:
copy * ..\*
Close the Close button from the top-right.
Once you complete the steps, your computer will reboot, and Windows 10 should be able to start correctly.
We’re focusing this guide on Windows 10, but the concept also should work on Windows 8.1 and Windows 7.