Problem absent in Parallels 8 There is light at the end of the tunnel, even for OSX 10.6.8 users! After installing the Parallels 6.0.12106 build and still having the problem, I found the error reporting instructions in this thread and tried them. You have to start with the sudo killall -ABRT prl_disp_service command or the error report will fail to complete. After that, you have to find the samples.txt file in a hidden folder using Finder's Go To Folder. Once I had done those things, I sent the samples.txt file off to Hanna (Juzci), who has been most helpful. She got me a great deal on Parallels 8, which has completely eliminated the problem. In PD8, prl_disp_service doesn't even run when Parallels is off, so there is no chance of it going haywire. And I've spent a bunch of time playing around with Windows 8 without the process going haywire on me. I'll install XP on it soon. Although I have only been using PD8 for a few days, I feel confident that the prl_disp_service problem is solved. Thank you, Parallels!