Windows 7 x64, Acrobat 9 Pro, Office 2010. I used to be able to select the context menu action "Combine supported files in Acrobat..." on multiple Office files, and it worked fine. But I recently had this computer reimaged, and now what happens is that, instead of automatically converting all the files to PDF then merging them, it instead converts the first file, brings up the save-as dialog for that file, then nothing. It just stalls out, displaying "Converting..." next to the first file and never moving on.
The only difference between my computer now and before is that before I was running under an admin account, while now I'm running under a restricted account, with elevation available as needed.