@pm67310 If I try Rufus with an ISO from Microsoft the following warning appears: Rufus detected that the ISO you have selected contains a UEFI bootloader that has been revoked and that will produce a "Security Violation" screen, when Secure Boot is enabled on a fully up to date UEFI system. - If you obtained this ISO image from a non reputable source, you should consider the possibility that it might contain UEFI malware and avoid booting from it. - If you obtained it from a trusted source, you should try to locate a more up to date version, that will not produce this warning. There is not a more up to date version of the ISO. If I run this script, select the ISO and Verify Signature (2011 vs 2023), I get: Certificate (Issuer CN) detected: Microsoft Windows Production PCA 2011 OUTDATED: Bootloader signed by 'Microsoft Windows Production PCA 2011'. If I perform a media update, select Windows_UEFI2023.iso and Verify Signature (2011 vs 2023), I get: Certificate (Issuer CN) detected: Windows UEFI CA 2023 VALID: Bootloader signed by 'Windows UEFI CA 2023'. However, if I try Rufus again with Windows_UEFI2023.iso, the same message as above appears. Shouldn't the script fix this problem?