Is there a way to re-install all Server Roles & Features in Server 2012?

As far as I can see from Server Manager all that can be done is to manually remove each and then re-install but I am hoping that MS have provided some way of just repairing / re-installing all installed roles & features. Anyone know if there is a way of doing that?

The reason for wanting to do this is that I have a Domain Server which after some recent MS updates has started causing numerous event log warnings & errors and has started behaving erratically.

I know that System File Checker will check installed files but that will not fix any registry permissions problems, which is where I think problems have arisen. Guess what I am looking for is some way to recreate the whole registry and it's permissions but without doing a complete re-install.

Thanks, Nick