(1) I have similar problems with different versions of Acrobat - originally with Pro XI, then DC, then back to Pro XI. With me, it may happen using Output Preview as with the other posters; however, mine will crash at ANY point in the use of it - from opening the program/opening a document to using any of the tools. It randomly comes up with "Acrobat Pro has stopped working..." and I have to close it & start over again. I work in a PrePress department with several other users, and I seem to have more difficulty than any of them. I have a Win 7 computer; networked. One point to note is that we use a plug-in called PitStop Pro ver. 12. It does not seem to matter whether this is active or not - the Acrobat will just quit randomly & unexpectedly. We tried the install/uninstall technique, switched from Pro to DC and back again, upgraded to 64-bit, etc. No luck.
(2) Smaller problem: no matter what I try, the initial view comes up HUGE when opening customers' PDFs; I try to set it at 75%, and have looked through every menu I can find. It consistently insists on zooming to 198%, 175% etc. Any ideas?