Revit Importing Issue

[BjornH]

I am no longer able to import any type of file into Revit. It doesn't matter if it is a CAD file, Image file, or a new Family. When I click the import or load button the program appears to freeze and no dialog box appears. I can hit escape and its back to normal. I tried seeing if the dialog box was hidden behind all my open programs but I can't seem to locate it anywhere.

Any input would be greatly appreciated!

Bjorn