Unable to change the registry key value

Sometimes Windows do not allow to install certain registry values. In this case normally Windows shall throw an error message. Basically, Windows operating system trying to prevent registry modifications in order to protect from external molecules programs and malware which is considered to be harmful.

What is the problem?

Unable to change the registry key value:

Windows display the following error message while trying to change certain registry key values. In this article, learn how to solve this problem by modifying registry permissions.

Identify the problem:

In Windows each registry item is assigned with permissions such as Full Control, Read and Special Permissions.
The Full Control permission provides full access to change the registry key value. Whereas the Read permission provides only read access, the user can not save the changes.

Solution:

Below are the sequence of steps explained to set or enable the Full Control permission to solve this problem.

1
In the Registry Editor screen, right click on the registry key folder and click on the Permissions menu item. Once you do that, Permissions screen will be displayed

2
On Permissions screen, check/set the Full Control permission. and click on OK and Apply button to save the changes.

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