I've got a recurring issue, since about December that is. I did some extended work for a client and we set things up so I could have access to resources without actually joining their domain (adding my PC to their network formally). I've done this for years but I haven't experienced this however.
When I click on the Big R (application button), to start a new project or open something, I have to wait as long as 60 seconds sometimes before it expands to display the menu. I've been primarily using Revit MEP but occasionally Revit Architecture too. They both exhibit the same sluggishness response to using the Big R. Revit Structure 2012 doesn't seem to be suffering from this however. Also if I just click the Open icon on the Quick Access Bar there is no delay. None of the Revit 2011 versions seem to be bothered by it either but I didn't use them during the last couple months either.
Some additional clues are:
Was connected to shared resources (drives and printers) without being added to the domain
Was using a Named Network Location (not a mapped network drive)
Have since deleted journal file data
Have since removed all Places referencing these shares
Have removed the shared printers
Removed references to invalid locations in Revit.ini files (main and user)
Removed CMDKEY stored information related to past external resources
Have done registry cleaning for references to the past network locations
Have removed the most recent installed external applications
Have a certain version of Revit installed that isn't supposed to be installed side-by-side
With all that in mind, when I revisited my .ini files tonight I removed all references to recent files and the performance is back to normal for now.
Any readers also experiencing similar sluggishness? Resolved it? Lemmeno