When I start rust, it loads up to "Loading Menu Background" and then I get this error.

Microsoft Visual C++ Run-time Library
R6025 - pure virtual function call

Another box pops up and says

The exception unknown software exception (0x0000015) occurred in the application at location 0x00735354.

I've tried; Uninstalling and re-installing Rust, verifying game cache, updating all windows updates, Run as administrator, I booted Microsoft .NET framework and looked on "cmd" for corruption files but all looks fine but this still does not work...
(I have Windows 7)

Please help.