I was chugging along just fine this morning and then Workstation froze with this error:
It took some time, but eventually Workstation shut itself down. I started it back up (but did not start the client), grabbed the logs, and then rebooted the host. When I started the client back up, Windows7 prompted to go into safe mode, but I had it load normally. The only issue was that the display was "locked" into 3 display mode, but only one screen. That meant I couldn't actually click anywhere within the client (I believe this is due to Workstation scaling the mouse pointer's location somehow). I've got a separate thread on this situation and was able to relatively quickly work around it.
Log files are attached.
It could be related to disk space as I've been running low on C:, but if so, I would have expected the error above to say something about that.