Microsoft.VC90.CRT. version= “9.0.30729.6161
This Microsoft.VC90.CRT error is usually caused by corruption in Windows installer or .Net framework.
The first step is download and install the Visual C++ 2008 redistributable x64 package. After installing this try installing Genstat again.
Microsoft are aware of this problem and several solutions have been posted here.
Additional solutions are available here.