@forster01:
1. Somewhat to be expected on Win 7, as its PowerShell version is too old. And I don't (can't?) hook the builtin version check to *NOT* close the window automatically, like I do for my own exit codepaths
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EDIT: Updated the script. It should now leave the window open to shout at you that your PowerShell is too old
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2. Yep, you're definitely going to see a "still processing" warning on the first boot after the initial install, that's perfectly normal
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On the other hand, if it persists after a reboot, that's more interesting... ^^.