I'm using parallels 12 and have just installed windows 10. Everything is working perfectly except for the screen resolution. The resolution is stuck at 1024x768 and the option to change it is grayed out. The display driver is showing as 'Microsoft basic display driver' and my monitor is showing as a generic non-PnP monitor. What do I have to do to fix this problem as currently it just looks terrible. i am using a macbook pro retina 2015