![KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com](https://wiki.esko.com/download/attachments/170033458/Secure%20Boot%20Violation%20error.png?version=1&modificationDate=1429525842593&api=v2)
KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com
![KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com](https://wiki.esko.com/download/attachments/170033458/Step%201.png?version=1&modificationDate=1429525841907&api=v2)
KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - KB164203491: CDI - Troubleshooting - "Secure Boot Violation" while starting the CDI - wiki.esko.com
Secure Boot Violation” may display when Secure Boot is enabled in BIOS and attempting to boot into Ubuntu and Debian - ThinkStation - Lenovo Support CH
![fix Secure Boot Violation The system found unauthorized changes on the firmware operating system - YouTube fix Secure Boot Violation The system found unauthorized changes on the firmware operating system - YouTube](https://i.ytimg.com/vi/ZN6i9N9Twa0/maxresdefault.jpg)
fix Secure Boot Violation The system found unauthorized changes on the firmware operating system - YouTube
![Secure boot violation. Invalid signature detected. Check secure boot policy in setup - Newbie - EndeavourOS Secure boot violation. Invalid signature detected. Check secure boot policy in setup - Newbie - EndeavourOS](https://forum.endeavouros.com/uploads/default/original/3X/b/3/b301c3ecb169a53f3828e8c417f47a19a40c488c.jpeg)