We are having an issue where using the open dialog or save as dialog from within autocad architecture 2014 will cause the program to become unresponsive. The program must then be manually closed via task manager.
This only happens with open and save as, if we just use ctrl + s to save, everything works fine. Same with opening a file by double clicking it in windows explorer. Also, in the open / save as dialog window, the top drop-down bar (which has a tiered directory of the computer / network) is blank, and clicking it does nothing. It's basically a drop down menu that doesn't drop down. This leads me to believe this is some sort of networking issue.
The offending computer is running Windows 8. The problem does not show up on our Windows 7 machines.
All the computers have the same antivirus installed, and the files being accessed are stored on another computer within the network.
The top pull-down navigation menu missing from open / save as dialogs has been resolved!
This discussion uncovered the root of the problem, which was having a phone / simliar device connected via USB. It seems having any device which shows up in My Computer under the "portable device" category will cause this navigation issue.
Note that this only affects our windows 8 machines, on windows 7 this isn't an issue.
Regarding the other freezing issues, Nvidia released new Quadro drivers today (K4000 for us) which has an interested note: “The NVIDIA® AutoCAD Performance driver is no longer integrated in the graphics driver. Standalone versions or version updates can still be downloaded from the NVIDIA driver download page.”
Note that no autocad performance driver has been released yet, but this may indicate that there was an issue with previous drivers. We have noticed a performance increase in autocad 2014 after updating to these new drivers.