The 2017 and 2016 64 Bit version system requirements doesn't include Windows Vista 64 Bit. I was able to install DWG Trueview 2013 64-Bit under a Windows Vista 64-Bit even though System requirements listed for DWG Trueview 2013 Description Requirement Operating system Service Pack 3 (SP3) or later of the following: Microsoft® Windows® XP Professional Microsoft® Windows® XP Home or the following operating systems: Microsoft Windows 7 Enterprise Microsoft Windows 7 Ultimate Microsoft Windows 7 Professional Microsoft Windows 7 Home Premium __________________________ I haven't tried installing DWG Trueview 2014 or 2015 64-Bit.
