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An over-the-top install was performed several days past using: Download Windows 11 Disk Image (ISO) for x64 devices https://www.microsoft.com/en-us/software-download/windows11 It produced the following results: 1 Refusal to boot until Secure Boot had been turned off. 2. A retro-build dating...

2011 certificates were revoked in a previous step. Are SVN and SkuSiPolicy tied together? After Microsoft updates SVN and SkuSiPolicy, is it necessary to apply them to the BIOS using Update_UEFI-CA2023.ps1?

Macrium Reflect 8.0.7783 SecureBoot-CA-2023-Updates.v2026.07.18 Desktop Windows 11Pro Version 25H2 Build 26200.8875 - Ran .\Check-UEFI.bat -Verbose - Ran .\Update_UEFI-CA2023.ps1 -Revoke -SkuSiPolicy - 2011 certificates had been previously revoked (April/May 2026), but I included -revoke...

Is there a retrofit?

Thanks for the information. It's another Microsoft do-it-yourself project.

If Secure Boot settings were erased, reboot into your computer after viewing Secure Boot Mode in the BIOS and update the certificates.

I rebooted my computer, used Advanced Startup to enter the BIOS, and viewed Secure Boot Mode.

After you log into the BIOS, you can access Secure Boot (enable or disable Secure Boot under Boot) and modify Secure Boot settings (under Security). The key was setting the BIOS password first. Secure Boot Mode was fixed at Standard. After I erased Secure Boot settings and rebooted, Secure Boot...

Acer machines have a password that must be first set and then entered to obtain access to Secure Boot. Here are specifics: https://hub.tcno.co/security/boot/acer/