Microsoft Store Error 0x80073CF9 — App Installation and Update Failures

Fix Microsoft Store error 0x80073CF9 preventing app installations and updates due to corrupted store cache, permission issues, or system file damage. This guide covers everything you need to know about this topic, including common causes, step-by-step solutions, and answers to frequently asked questions.

Here are the key things to understand: Error 0x80073CF9 occurs when the Microsoft Store cannot install or update apps. The error may appear for specific apps or affect all Store operations. Microsoft Store cache corruption is a frequent cause that is easily resolved. Windows Update and Microsoft Store share some infrastructure — issues in one can affect the other. AppX deployment service must be running for Store app installation. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Microsoft Store cache corrupted from interrupted downloads or updates. Windows App deployment service (AppXSvc) not running or in error state. Corrupted system files affecting Windows Store infrastructure. Date/time settings incorrect — Store authentication requires accurate system time. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Reset Microsoft Store cache: press Win+R, type 'wsreset.exe', press Enter — wait for the Store to reopen. Repair Microsoft Store: Settings > Apps > Microsoft Store > Advanced options > Repair, then try Reset if Repair fails. Ensure date/time are correct: Settings > Time & Language > toggle 'Set time automatically' off and on. Run the Windows Store Apps troubleshooter: Settings > System > Troubleshoot > Other troubleshooters > Windows Store Apps. Re-register Store apps: open PowerShell as admin and run 'Get-AppxPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}'. If these steps do not resolve the issue, consider consulting additional resources or a qualified professional.

This article is part of our Windows Error Codes collection on Error Codes Wiki. We provide comprehensive, up-to-date information to help you find solutions quickly.