When I updated to build 32408, my Windows 10 guest no longer uses the full resolution of my display. I am on an iMac with 2560 X 1440 displays. The largest resolution available in Windows 10 is 1920 X 1200. When I go into full screen mode with the Auto scale setting I get black bars on each side of the window. I did not get these yesterday. If I come out of full screen, the aspect ration of the window is locked and when I drag the lower right corner, I can't use the full width, only the height. I have rebooted both the guest and the host. I have reinstalled Parallels Tools and I have reset the virtual machine. Help!
Problem solved. Turned out something had happened to the parallels tools install on the upgrade and it was still on the previous version. Completely uninstalling from Windows 10 and then reinstalling after restart solved the problem.
