The Rapid Recovery agent install fails with error 79
The AppAssure agent install fails with the 1603 (and even 1601) error.
Manually installed pre-requisites may appear to install correctly, but all attempts to install the agent either through the agent install exe, or the extracted .MSI file, are failing.
Other programs may install without issues, but the Appassure agent/pre-reqs fail or do not in stall properly.
Copy WdfCoInstaller01009.dll, place it in C:\Windows\system32 and reboot.
You can find this DLL from a working server of the matching OS in your environment. Another option to obtain this DLL is to locate the temp folder created in %temp% at the time of the installation.