Some updates:
Even with the suggested driver the problem happened again - and this time after the 1st simulation! So it does not seem that the new video drive is the final solution.
The IT guy told me that they have already opened a case - at nearly a month ago! Since it was opened as a "minor impact" case I think PTC let it in the freeze because they got no feedback until now.
The good thing is that the work-around is not that bad. From your opened model just create a new part (it does not need to have anything in it) and thus you can call your simulation result from the "application" Ribbon. So you can have access to your Simulate results until you feel motivated enough to re-start Creo :-).
Although a bit off-topic I´ll observe if with the new video driver I have less occurrence of an "old" problem - the complete crash of Creo when visualizing a result - especially if the "animate" is selected.
If I have to do a list of intermittent problems that I had in the "result" mode I could open 2-3 more cases. Although my motivation to open a case for intermittent problem is usually low it is a good idea to share it in the PTC community as it may be more common than we think.
