I am having trouble installing Windows Mobile Device Center 6.1 on Windows 8.1. I realize it is not fully supported by Microsoft but many people have been able to get it to work. Most responses online have come down to .Net 3.5 which I have verified is installed and confirmed it is working by installing other software that requires it.
When you plug the device in it says the installer has encountered an error. If you run the software manually it will start the install get about halfway and roll back the bar and close the installer without any notice. It does not write anything to the event logs.