Get-AppxPackage *Microsoft.UI.Xaml.2.8* | Remove-AppxPackage Cause: Architecture mismatch (e.g., trying to install x86 on Arm64).
| Architecture | When to use | | --- | --- | | | 32-bit Windows, or 32-bit apps on 64-bit Windows (rare for modern systems) | | x64 | Most modern PCs with 64-bit Windows | | ARM64 | Surface Pro X, Samsung Galaxy Book Go, or any Windows on ARM device | microsoft.ui.xaml.2.8 appx download
This article provides a complete walkthrough: from understanding the framework to safely downloading, verifying, and installing Microsoft.UI.Xaml.2.8 via the Appx package. Unlike classic desktop applications (Win32) that bundle all dependencies inside their installer, many modern Windows apps (including those from the Microsoft Store, and packaged desktop apps) rely on framework packages . These are shared components installed at the system level. Get-AppxPackage *Microsoft
No action needed. Or, if you need to reinstall, uninstall first: These are shared components installed at the system level
Add-AppxPackage -Path "C:\Downloads\Microsoft.UI.Xaml.2.8.appxbundle" To force a system-wide installation (for all users):
Redownload directly from NuGet or GitHub. Verify the digital signature: Right-click the .appx → Properties → Digital Signatures → highlight Microsoft signature → Details. Error 2: "A higher version of this package is already installed" Cause: You already have Microsoft.UI.Xaml.2.8 (or newer, like 2.9) installed.
DISM /Online /Add-ProvisionedAppxPackage /PackagePath:C:\Downloads\Microsoft.UI.Xaml.2.8.appxbundle /SkipLicense After installation, verify it’s present and registered. Using PowerShell: Get-AppxPackage -Name Microsoft.UI.Xaml.2.8 Expected output includes the full package name, version, and architecture. Using File Explorer: Navigate to: