Fix Error 7812021, Verification of Some Files Failed in Tower of Fantasy on Windows (Re-updated)

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Here's how to Fix Error 7812021, Verification of Some Files Failed in Tower of Fantasy on Windows.

8/11/2022 added:
1. Launch the START REPAIR option in System Diagnosis tab (Few Times).
2. restart the launcher.
3. Restart Your Device or Console.
4. update current graphic drivers via Avast Driver Updater@ https://www.anrdoezrs.net/click-7952654-14577796.
5. Ensure your security software (antivirus or firewall) allow Tower of Fantasy through its settings.
6. remove then reinstall the game.
7. Check or review Tower of Fantasy System Requirement. Upgrade your hardware if needed.
8. Wait.