We have Harvest 12.5 and while doing a test upgrade receives the attached error message.
"Error 1723. There is a problems with this Windows Installer package. A DLL required for this install to complete could not be run. Contact your support personnel or package vendor"
Assuming it is due to corrupted installation media I downloaded setup files again and got the same result in second attempt also
Follow these steps:
Install Microsoft Visual C++ 2013 Redistributable on the Windows system as a pre-requisite.
Further details available in Harvest 13 release notes