I started using Parallels 11 in past month and love it; however, I am often having to restart Parallels Desktop because instances of running Windows 7 programs somehow get corrupted and will not activate -- therefore becoming unusable while running. When this happens, if I click on the running Winows application, it briefly activates, but then the active application on my Mac switches to Finder. I am generally able to hit the Close box to kill the Windows app, and Restarting Parallels Desktop generally resolves the problem,. However, this is obviously an annoying (and seemingly unpredictable) problem. Has anyone else had this issue and been able to solve it? Thanks! I am generally running Windows 7 in Coherence mode