Yesterday, using the Hasleo EasyUEFI program, I noticed that a folder called Certs was added to the UEFI system partition (ESP). Inside this folder is the WindowsOEMDevicesPK.der certificate. This folder was added when the BIOS certificates were updated to 2023.
Finally, the dreaded BIOS update was successfully completed in the easiest way possible, thanks to the Garlin's SecureBoot-CA-2023-Updates.v2026.05.27 file. After putting the BIOS into setup mode by deleting all existing keys, I ran Update-UEFI.bat, restarted, and successfully re-enabled...
ChatGPT suggested:
"For the remaining lifespan of this laptop on BIOS v1.25.0, you must permanently leave "Enable Custom Mode" checked. Because Dell has marked your laptop's motherboard as End-of-Life, BIOS v1.25.0 will never receive a factory firmware patch to fix this bug.
Here is what happens...
After Mosly failed to update the three keys due to this stubborn Dell Bios (probebly there is a factory bug) I had to open the laptop cover and reset the bios via (CMOS) battery to get the original factory keys, especially the PK. Then I re-installed Windows and updated the system but every...
Hi Garlin
I used Mosby but did not work although the log file shows successful result:
[Mosby session started: 2026-05-01 10:59:39]
Mosby v3.1 x64
UEFI v2.40 (American Megatrends, 0x0005000B)
Dell Inc. 1.25.0
Dell Inc. Inspiron 7573
System SBAT is 2024010900, Embedded SBAT is 2025051000...