Windows 10: Error code 191, Unable to install UWP apps on Windows 10

Some Windows 10 users are reporting that for the past few months they have been having problems installing Microsoft store and UWP apps – most notably Adobe XD – a UWP app. In today’s post, we will attempt to offer [...]

This post Error code 191, Unable to install UWP apps on Windows 10 is from TheWindowsClub.com.

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Can't install UWP apps (Error code 191)

For the past few months I have been having problems installing Microsoft store and UWP apps and just recently I tried to install Adobe XD (A UWP app) which gave me this error:

So far I have tried basically every possible solution on the internet from editing services, resting the store, uninstalling and reinstalling apps, turning off internet security, editing security permissions for folders and my account, typing in cmd and
PowerShell commands, enabling developer mode, updating my PC, making new admin accounts and multiple hour long remote computer assistance from both Microsoft and Adobe support. Nothing has worked... So as a last try I am posting here to see if anyone more
knowledgable about Windows has any ideas?

 

Microsoft Adds Ability to Block Win32 Apps from Install on Windows 10

Yes, UWP is an interpreter, an app running in UWP can't function without the interpreter. Only the UWP core has access to the actual hardware, the app does not.

By not having direct access to the hardware, they perform slower. UWP has to translate everything and make sure it passes safety and security checks.

If UWP has issues, all of the apps running on top of it also will. I've seen that in early release of Windows 10 where all UWP based, Windows-included apps broke (Edge, Calculator, Mail, etc.). Granted, it was only broke in one user account.

 

Microsoft Adds Ability to Block Win32 Apps from Install on Windows 10

"UWP is completely managed (memory pointers are forbidden) like .NET Framework is."
I was talking about apps built for the UWP framework, not UWP itself. I'm fully aware that UWP and .NET Framework are predominantly coded in C++ like much of Windows.

IntPtr is a managed pointer. It is almost strictly used for external calls where pointers are unavoidable.

/unsafe can lead to not getting Windows Store certification.