Fix Windows Store Error 0x803fb107

Windows Store error 0x803fb107 typically appears when you try to download or update an app, and it usually points to a problem with the Store’s cache, corrupted system files, or a misconfigured network connection. This guide walks you through the most effective fixes, from simple cache resets to more advanced system checks, so you can get back to installing apps quickly.

What You’ll Need

Administrator access to your Windows PC (to run commands and reset the Store).
A stable internet connection.
Your Microsoft account credentials (in case you need to re-sign in).

Step-by-Step

Run the Windows Store Apps Troubleshooter. Go to Settings > System > Troubleshoot > Other troubleshooters (on Windows 11) or Settings > Update & Security > Troubleshoot &em; Additional troubleshooters (on Windows 10). Select Windows Store Apps and run it. This automated tool can detect and fix common issues causing error 0x803fb107.
Clear the Microsoft Store cache. Press Win + R, type wsreset.exe, and press Enter. A blank Command Prompt window will open, and it may take a few minutes. When it finishes, the Store will open automatically. This clears temporary files that often cause download errors.
Check your date, time, and region. Incorrect system time or region settings can break the Store’s connection to Microsoft servers. Go to Settings > Time & Language and ensure Set time automatically and Set time zone automatically are on. Also verify your region under Settings > Time & Language > Language & region matches your actual location.
Reset the Store app itself. Go to Settings > Apps > Installed apps, find Microsoft Store, click the three-dot menu (or the app name), and choose Advanced options. Scroll down and click Reset. This is more thorough than wsreset.exe and will clear all app data, so you’ll need to sign in again.
Re-register the Microsoft Store app via PowerShell. Right-click the Start button and select Windows PowerShell (Admin) or Terminal (Admin). Run this command and press Enter:
Get-AppxPackage -AllUsers Microsoft.WindowsStore | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}
Wait for it to complete, then restart your PC.
Run DISM and SFC scans. These repair corrupted system files that can interfere with the Store. Open an elevated Command Prompt (right-click Start > Command Prompt (Admin) or Terminal (Admin)). First run DISM /Online /Cleanup-Image /RestoreHealth and let it finish. Then run sfc /scannow. Restart after both complete.
Check your proxy and VPN settings. If you use a VPN or proxy, try disabling it temporarily. Also, go to Settings > Network & Internet > Proxy and ensure Use a proxy server is off (unless you need it for your network).
Sign out and back into the Store. Open the Microsoft Store, click your profile icon at the top, and choose Sign out. Restart the Store and sign in again with your Microsoft account.

Common Mistakes

Skipping the troubleshooter: Many users jump straight to complex commands, but the built-in troubleshooter often resolves the issue instantly.
Not running PowerShell as administrator: The re-registration command will fail if you don’t open PowerShell or Terminal with admin rights.
Ignoring date/time errors: Even if your clock looks correct, a slight drift can cause authentication failures. Always toggle the automatic settings off and on again.
Using a third-party “cleaner” that disables Store services: Some optimization tools disable the Microsoft Store Install Service or related services. Make sure they are set to automatic in Services (services.msc).

Tips

Keep Windows updated: Many Store errors are fixed in cumulative updates. Check Settings > Windows Update and install all pending updates before troubleshooting.
Use a wired connection: If you’re on Wi-Fi, a temporary wired connection can rule out network instability.
Check for large downloads: Sometimes the error occurs due to insufficient disk space. Ensure you have at least 10 GB free on the drive where you install apps.
Run the fixes in order: The steps are arranged from least to most invasive. Try them sequentially; you may not need all.

Troubleshooting

If the error persists after trying all the steps above, consider these additional checks:

Check for conflicting software: Temporarily disable your antivirus or firewall (if not Windows Defender) and try the Store again. Some security suites block Store connections.
Create a new user account: A corrupted user profile can cause Store errors. Create a new local administrator account (Settings > Accounts > Family & other users) and test the Store there.
Use Windows Update Troubleshooter: Run the “Windows Update” troubleshooter from the same Troubleshoot menu. It can fix underlying update service issues.
Check the Windows Store service: Press Win + R, type services.msc, and find Microsoft Store Install Service (if present). Ensure it is set to Manual and Running. Right-click it and select Start if it’s not running.
Perform a system restore: If the error started recently, use System Restore to revert to a point before the issue began. Search for “Create a restore point” in the Start menu, then click System Restore.

Frequently Asked Questions

Why does error 0x803fb107 happen?

It usually indicates a corrupted Store cache, misconfigured system files, or a network issue that prevents the Store from reaching Microsoft’s servers.

Will I lose my installed apps if I reset the Store?

No, resetting the Store only clears its cache and settings. Your installed apps remain intact, but you’ll need to sign in again.

Can I fix this without admin rights?

Most fixes require administrator privileges. If you’re on a work or school device, contact your IT administrator.

Is this error related to my Microsoft account?

Sometimes, but it’s more often related to system files or cache. Still, signing out and back in can help refresh the authentication.

How long does the DISM scan take?

It can take 10–30 minutes depending on your system and internet speed. Don’t interrupt it; let it finish.

What if none of these steps work?

If the error remains, consider using the Media Creation Tool to perform an in-place upgrade repair, which reinstalls Windows while keeping your files and apps. Backup your data first.

General steps for current mainstream versions; menus can differ by device and version. See the disclaimer or report an error.

More in this bed

The whole Tech How-To bed →