Screen resolution reverting after reboot
From WikiTechia
After rebooting into windows the screen resolution of a single head will revert to its lowest possible resolution and colour depth.
In fact, it's a problem associated with a single user profile on the system and hence will manifest with just a logout and login.
Solution
The solution is easily solved by making sure Hardware acceleration is turned on for all graphics cards.
- Control Panel->Display
- Settings->Advanced->Troubleshoot
- Set Hardware acceleration is set to Full and click OK.

