Okay, I have not seen a solution yet for DWG Trueview 2014 not installing with the error message "Operating System not supported". I have tried everything that I have seen in the community and still can't get past this issue. I am running on a 64 bit system and have removed everything associated with AutoDesk from my PC. I have the latest versions of everything required (.NET, Windows 7 Professional, IE, etc.) and still can't get this to work. Any help would be greatly appreciated.
Most common problem would be using a 32-bit installer with a 64-bit operating system, or vice versa.
Interesting. Just for shiggles, try the 32-bit installer. If that still fails I recommend posting in the Installation board. You'll get more help with this specific problem there.