Installer Integrity Check Has Failed Ubisoft

This page provides the guide for Installer integrity check has failed Reddit, Ubisoft Connect, Installer integrity check has failed Windows 11, Ubisoft Connect NSIS error, Ubisoft Connect download, Uplay download, Ubisoft Connect PC, Ubisoft Connect latest version.

The “Installer Integrity Check Has Failed” error from Ubisoft usually means that the installation files are corrupted or incomplete. This can happen during downloading or if an antivirus or firewall interferes with the process.

Here’s how to fix it:

✅ 1. Delete the Corrupted Installer

• If you’re installing a Ubisoft game (e.g. through Ubisoft Connect), delete the installer files from:

  C:\Program Files (x86)\Ubisoft Game Launcher\games\[Game Name]


✅ 2. Clear Ubisoft Connect Cache

1. Close Ubisoft Connect completely.

2. Navigate to:

   C:\Program Files (x86)\Ubisoft\Ubisoft Game Launcher\cache


3. Delete all files inside the cache folder.

4. Restart Ubisoft Connect.

Also Read : Ffbridge Espace Licencié Se Connecter

✅ 3. Re-download the Installer/Game

• A fresh download often resolves integrity issues.

• If using a web-downloaded setup file, delete the old installer and download it again from the official Ubisoft site.

✅ 4. Disable Antivirus or Add an Exception

• Antivirus software can corrupt downloads or block installer components.

• Temporarily disable it or add Ubisoft Connect and the game’s folder to the exclusion list.

✅ 5. Run as Administrator

• Right-click on the installer or Ubisoft Connect and select Run as administrator.

✅ 6. Check Disk for Errors

Corrupted sectors can interfere with installs:

1. Press Windows + R, type cmd, and press Enter.

2. Type:

   chkdsk /f /r


3. Restart your computer.

✅ 7. Check Internet Stability

If the installer is being downloaded in real-time (e.g., via Ubisoft Connect), ensure:

• Stable connection (prefer Ethernet over Wi-Fi).

• No VPN or proxy interfering.

“Unable to start download” error in Ubisoft Connect PC