If you get this error on the Fredaikis Anti-Cheat Launcher it means that the Launcher was unable to install the FAC Service. The error log shown in the launcher will contain detailed technical information to aid troubleshooting the root of the issue.

Here is what you can try to do to troubleshoot:

• Make sure your Windows Installation is up to date with the latest security updates and fixes.
• Try to temporarily disable any anti-virus or completely whitelist the game and FAC files which can be found in "%appdata%/FAC".
• Run a System File Check to fix any corrupted Windows Files by opening a Command Prompt as Administrator and running "SFC /scannow".

If you still can't solve your issue, feel free to send a ticket with a copy of the error log.