Hi there, You need to increase your budget for GTA 5 1080P 60 FPS, You will need GTX 1050ti. if your budget is 21k then you will get this card self only in 21k ruppees.
Reinstall your windows, Easy fix or just roll back in safe mode, Press F8 before windows logo and go into safe mode and roll back. or Uninstall GPU drivers and reinstall it in safe mode. :popcorn2: