How to Fix Can't Install Apps Outside Microsoft Store — Sideloading Blocked on Windows
Windows blocking app installations from outside the Store? "The app you're trying to install isn't a Microsoft-verified app" error? Enable sideloading.
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Main Troubleshooting Guide
How to Fix Microsoft Store Not Working →Complete symptoms, causes, and step-by-step solutions
Symptoms
You might be experiencing this problem if you notice:
- •"The app you're trying to install isn't a Microsoft-verified app"
- •Can't install .exe or .msi files — Windows blocks them
- •"App recommendations" preventing non-Store app installs
- •SmartScreen blocks every downloaded app
- •APPX/MSIX sideloading not allowed
- •"For your protection" popup blocking installations
Common Causes
- ⚠App installation settings set to "Microsoft Store only"
- ⚠Windows S Mode active (Store-only by design)
- ⚠SmartScreen blocking unrecognized apps
- ⚠Developer mode or sideloading not enabled
- ⚠Group Policy restricting app installations
- ⚠Organization policy blocking non-Store apps
Solutions
Solution 1: Change App Installation Settings
- 1Settings → Apps → Advanced app settings
- 2Under "Choose where to get apps":
- 3Select "Anywhere" to allow all app sources
- 4Or "Anywhere, but let me know if there's a comparable app in the Store"
- 5If this dropdown is greyed out: you may be in S Mode
- 6If set by organization: IT admin needs to change the policy
Solution 2: Exit Windows S Mode
- 1S Mode restricts to Microsoft Store apps only:
- 2Settings → System → Activation → "Switch to Windows 10/11 Home"
- 3Or: Microsoft Store → search "Switch out of S Mode" → Get → Install
- 4This is FREE and one-way — you cannot go back to S Mode
- 5After switching: you can install apps from anywhere
- 6No data is lost during the switch
Solution 3: Enable Developer Sideloading
- 1For APPX/MSIX packages (not EXE/MSI):
- 2Settings → System → For developers → toggle "Developer Mode" ON
- 3Or just "Install apps from any source, including loose files"
- 4For PowerShell sideloading:
- 5Add-AppxPackage -Path "path\to\app.msix"
- 6If blocked by Group Policy: gpedit.msc → Computer Config → Admin Templates
- 7Windows Components → App Package Deployment → "Allow all trusted apps to install"
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