Diagnostic Policy Service cannot be started

[TechnoSparks]

I've searched the forum but most error text is different. Mine is simple.. It says

Windows cannot start Diagnostic Policy Service on this local computer.

Error: 5 Access is denied

I've tried multiple things however I cant get it fixed..
I tried system restore but system restore took 4 days and SURPRISINGLY, the restore failed..

I am planning to do system image restore.. Any help will be appreciated.. And oh, help me about the system restore too

 

[TechnoSparks]

I guest there's no "fish in the pond"??