NOTE: you should have latest intel HD graphics Driver installed on PC
this is what happens when u open a game in lower resolution than 1920*1080 and 1366*768
now right click on the desktop and click on screen resolution
Select a lower resolution than recommended one ( in this case im selecting 1024*768 to be on the safe side )
Click Ok
Select keep changes when warning window pops out
now go to the desktop and right click , select graphics properties
Select the display option ( if it asks you to start it in Basic, advanced or wizard mode select advanced and then select display option )
Under the display screen tab select the option "Scale Full screen"
Click on the apply Button
Select keep changes when warning window pops out
Close the Graphics Control panel
Go to desktop right click and select Screen resolution again
Select the recommended resolution ( In this case we are having 1920*1080 )
Click Ok
Select keep changes when warning window pops out
Run the game again ( Problem Solved ) Now game will run full screen at all times
Kind Regards