Installing *.msi files, with build 13.0.48, generates an error message: "This installation package cannot be opened ... ". I think this is some permissions issue since one can install the same .msi file in Windows Explorer, and the installer service WAD i.e. all *.msi files install as usual.
What’s an example file that has the error?
I have tried loading many *.msi installer files, but the last one I attempted, which again failed, was the latest version of calibre 7.0. But also try installing the latest version of Edge, etc. All of them fail but load when I use Windows Explorer. My user account is an Administrator account. Pardon my ignorance, but I don't know why there are two types of installer files, and for some reason, Microsoft seems to love *.msi files. Suitable old *.exe files always work for me. I wouldn't say I like *.msi files. I have tried converting the *.msi to *.exe using a utility I found, but that workaround is instead hit and miss. It works with some *.msi files but not others, but in my view, good old DO should eat *.msi files for breakfast, but for some reason, it fails in 95 per cent of the cases, maybe 100 per cent. I haven't been doing accurate stats, but I do know it's very frustrating and problematic.
For what it's worth, had no issue installing Calibre 7.0 msi on my WIn10 64 Pro system via DO13.0.48 just a few minutes ago.
No issues installing Calibre here either:
Things that might cause problems on your machine:
Running Opus as administrator (see Why NOT to run Opus as Administrator under UAC).
Antivirus or similar blocking something if Opus was the process that launched it.
Changes to the .MSI file type.
I don't know what you have to done, or maybe I have done, but [Directory Opus 13.0.50 beta] installing *.msi files seems to be working again. What I cannot explain is why before Explorer and all alternative file managers worked, i.e. installed *.msi files without generating an error message? Only god knows, or maybe Superman, aka Jon, but I am happy again - yes, small minds are delighted about little things. That's why Einstein could never understand quantum mechanics.
Good to know it's working now!
AFAIK we didn't change anything on our side for this one, but it's useful to know it's resolved one way or the other.