I did some searching on the error message and some think it may be malware
related and some think it is a missing runtime for C++.
We do test the installers on clean machines, so I lean toward the malware
answer.
The path in one of the error messages is unusual - Explorer.exe in an
AppData folder - would be good to see where that program came from.
The error seems to be pretty early in the installation process, which makes
me think it is not something the installer has added to the system.
Hope this helps,
John+Wickberg
Paratext Support