The emWave software for Windows (both PRO and e2 versions) needs the 2010 MS Visual C++ redistributable to run.
You may see this message during install.
Ordinarily all you need to do is click OK and the installation will complete:
In some rare cases you may see this message:
To manually install the C++ run times click on the links below:
For 32 bit machines download vcredist_x86.exe for Microsoft Visual C++ 2010
Redistributable Package (x86) Click here
For 64 bit machines download vcredist_x64.exe for Microsoft Visual C++ 2010
Redistributable Package (x64) Click here