Dear all specs: macbook pro 15" retina windows 8 Pro on boot camp parallels 8.0.18354 Parallels is a strange program. Things first work fine, and then over time things work less and less and less well. The latest issue is the following. When using a program, for example Matlab, in Windows, all of a sudden the contents of the windows become black. Not completely black, just enough parts to make it unusable. The only solution is then to shut down the virtual machine and restart it. Then it works, but after a undefined while, it happens again… What to do? Thanks for the help jelle
