I am unable to install the ArcGIS Diagrammer software because it gets stuck in the "Select Installation Folder" window. A separate window pops up and says there is not enough disk space to install and lists all the drives and says the ones without enough space are highlighted. None of the drives are highlighted because they all have way more than enough space for the installation but the window keeps popping up and won't proceed with the installation (see below) Any suggestions? I have Windows 7, ArcGIS 10.1 and Visio 2013.
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