Ever since the latest update for adobe reader has come out I have been unable to open some PDF's. This was never an issue with the older version. When I try to open certain PDF's the reader says "Not Responding" and nothing happens. This does not happen on all PDF's, just some.
I have also been experiencing a problem much like this, when opening some PDFs, specifically secured ones it would seem Reader X pauses for several minutes, registering as "Not Responding" and then springs back into life and opens the document.
Once one secured document has been opened others can be opened fine so long as Reader X is not closed .
I am running Windows 7 pro x64.
Ditto on Darrenz16's problem. New WIN7-64 Home Premiun system with Adobe Reader 10.1.2. Reads several files, then starts locking up when I try opening new files. Seems like Reader is failing to release some resource and eventually running out of whatever it is. Rebooting seems to help temporarily. Never had this problem on previous systems. A set of good examples are the .pdf files at the bottom of this page: http://www.hussman.net/weeklyMarketComment.html
I can open a few, but then Reader locks up trying to download the files.