[How to grey out "Automatically check for updates when paint.net starts"]

Hi all,

 

How could I grey out the options "automatically check for updates when paint.net starts" and "also check for pre-release (beta) versions of paint.net"?

 

The Reg Key values are 0 (meaning they are disabled); but I would like to grey out that option so a user would not be able to select it back.

 

Refer to attachment.

 

Any help would be appreciated.

 

Thanks