Credit to @PencilNavigator for the original guide, I'm just trying to fix it up so it's more readable.
I have seen many posts about not being able to install UWP apps manually, some are common issues like not having VCLibs, UI.xaml, etc. To manually install UWP apps on AtlasOS, follow these steps:
Apps on the Microsoft Store
Copy the app's Microsoft Store URL.
This can be found by visiting https://apps.microsoft.com, and then searching for an app. Open the app's page, and copy the URL in your address bar.


Paste the link you got on this website (set the search filter to URL, and the right side bar to Retail): https://store.rg-adguard.net/

If you see additional packages (dependencies) appearing, download them together with your app, pick the correct files for your architecture (x64)
In this case the following should be downloaded:
KDEe.V.Filelight_23.400.1330.0_x64__7vt06qxq7ptv8.BlockMap
KDEe.V.Filelight_23.400.1330.0_x64__7vt06qxq7ptv8.appx
4. After downloading all app files, put them all under the same folder.
In this case, I am putting it all in C:\WSA
- Open Powershell with administrator access (Right-click the start button -> choose PowerShell (Administrator)), and enter the folder you put the files in.
In this case, I will type cd C:\WSA
- Perform this command for all packages:
Add-AppxPackage YOUR-APPXPACKAGE-NAME
In this case, I will be doing this command twice:
Add-AppxPackage KDEe.V.Filelight_23.400.1330.0_x64__7vt06qxq7ptv8.appx
Add-AppxPackage KDEe.V.Filelight_23.400.1330.0_x64__7vt06qxq7ptv8.BlockMap
Your Microsoft Store UWP app should be installed successfully.
Non-Microsoft store UWP apps
- Perform the
Add-AppxPackage
command with administrator access on Powershell to the appx file you have (step 5 in the above section).
- If not installed correctly, Powershell will give you an error message. (usually missing VCLibs or something, find it on the internet (or store.rg-adguard.net) and install it with
Add-AppxPackage
)