Windows Store Error 0x80073CF9 — App Installation Failed

Windows Store error 0x80073CF9 means an app installation or update failed, typically due to corrupted Store cache, disk space, or Windows Store service issues. 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 during Microsoft Store app installation or update. The Store cache may be corrupted, preventing package deployment. Insufficient disk space on the system drive can trigger this error. Windows Store service components may need resetting. AppX deployment service may be stuck or malfunctioning. Understanding these fundamentals will help you diagnose and resolve this issue more effectively.

The most common reasons this occurs include: Corrupted Microsoft Store cache files. Insufficient disk space on C: drive for app installation. Windows Store service (WSService) or AppX Deployment Service malfunction. Antivirus blocking Store app package deployment. Damaged Windows Store app registration. Identifying the root cause is the first step toward finding the right solution.

To resolve this, follow these recommended steps: Reset Store cache: press Win+R, type wsreset.exe, press Enter — wait for Store to open. Ensure at least 10GB free space on C: drive. Re-register Store apps: PowerShell (admin) > Get-AppxPackage -AllUsers | Foreach {Add-AppxPackage -DisableDevelopmentMode -Register "$($_.InstallLocation)\AppXManifest.xml"}. Reset Microsoft Store: Settings > Apps > Microsoft Store > Advanced options > Reset. Create AUInstallAgent and AppReadiness folders in C:\Windows\temp if they do not exist. 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.