Hello.
Thank you for noting the changes in the installer behaviour, as it moved from March to April. Please note, however, that the latest update to Parallels Desktop was released in February.
We have conducted internal testing, and indeed it appears that most recent MetaTrader installers, released in April, currently encounter a 0xc0000017 when trying to run the installer.
Considering that the MT5 installers released in March can successfully install on newly created virtual machines, the issue is likely caused by the changes in the installer itself.
For now, as a possible workaround, you can try using the previously released March installer for MetaTrader 5, that we have uploaded, to check if you can install it, by downloading it from the following link:
https://fe.parallels.com/7ed5e7078e75321483514d2396af387a/
Note: Installer was downloaded from the official website, build 3661 March 25th.
The software should be able to be updated to the latest April version after the installation: Open MetaTrader 5 -> in the top bar, click "Help" -> "Check Desktop Updates" -> "Latest Release version".
Note: The update can take a few minutes to download and complete.
Let us know if you can install it using the March-released installer.
Thank you.
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