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HP BCU and WMI report error 6 (Access Denied) When I try to disable Legacy Support

HP Recommended
HP 350
Microsoft Windows 10 (64-bit)

I am trying to automate the process of converting HP computers from BIOS to UEFI. The HP 350 laptop supports UEFI, but when I try to change it using the BiosConfigurationUtility it throws and error code 6 at me. I get the same when trying to do this in WMI directly with powershell.

 

The BIOS is password protected and I am providing the correct password (a password file in the case of the BCU).

 

Is there a way I can automate this change?

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I am able to do this with an HP ProDesk 600, so maybe it is because the laptop isn't a Pro version.

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I am able to do this with an HP ProDesk 600, so maybe it is because the laptop isn't a Pro version.

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