I have noticed a way to recover from this issue within 30 minutes or so. Here are my steps: [...] Let it sit for a few seconds, then turn it on. Start up computer. Let it startup for a few minutes. It will probably still be sluggish. Shut down the computer again. Then start it up again. Thanks to the poster for taking the time to outline what worked for them. But this is just ridiculous. For those of you who just want to get your job done, I recommend cutting your losses. A month ago I downloaded VMWare Fusion (there is a 30 day free trial). It's been working flawlessly. I have my productivity back. I'm never going back to Parallels.