After doing some research, all signs pointed to a Parallels desktop update, but after downloading Parallels again today, I'm still having the same issue. When I open Parallels, it opens, but disappears. When I go to mission control, it will find it, but when I click on it, the window disappears again. However, when I shift desktops, it pops back up in front of the windows (see screen shot) Before updating Parallels, I got an error telling me to enable hardware virtualization support in my Mac's firmware. Any help would be appreciated. Thanks!