1. reinstall C++ 2012 x86 and x64 from the cd/dvd or install folder (c:\autodesk or maybe c:\autodesk\motionbuilder2015\) if you want to keep the files
2. restart the pc
3. run an administration level cmd prompt (start right click the CMD icon in accessories or in win8 press the win key and type CMD and right click the icon)
4. run this to unregister and re-register the msiexec
Code: Select all
msiexec.exe -unreg
msiexec.exe -regserver
6. install your demo or commercial version of motionbuilder 2015.