CODEWITHSUNDEEP
windowspowershellregistrywindows-10bios
user6317321
user6317321

Reputation:

Is there any way to change the SMBIOSVersion value in win32_bios in windows?

As illustrated in the picture bellow, by tweaking the registry in windows 10 I was able to change the bios version but not the SMBIOSVersion, which is what i want. Is there any way to alter it? Not necessarily permanently. I don't care if the value is restored after a reboot, i just want the win32_bios containing an SMBIOSVersion that i have specified until shutdown so calls to it will return my specified version.

enter image description here

Upvotes: 0

Views: 4390

Answers (2)

TessellatingHeckler
TessellatingHeckler

Reputation: 29013

It's coming from WMI, and the Win32_BIOS provider is defined in c:\Windows\System32\wbem\cimwin32.mof as a dynamic provider calling from cimwin32.dll.

But it does seem to be possible to override it; create a new file somewhere, e.g. c:\user\spkone\test.mof and put this in it:

#pragma namespace ("\\\\.\\root\\CIMv2")

class Win32_BIOS
{
    [key]
    string SMBIOSBIOSVersion;
};

[DYNPROPS]
instance of Win32_BIOS
{
    SMBIOSBIOSVersion = "wow";
};

Run an administrator command prompt or PowerShell, and run mofcomp test.mof.

Image of running mofcomp.exe to compile the test .mof file

Before:

Image of get-wmiobject win32_bios before the change

After:

Image of get-wmiobject win32_bios after the change

I got this far and then stopped, I don't know how far the change reaches, or what the implications are. It does show in another PowerShell process, anyway. I'll leave it to you to fill in the other details ;)

Upvotes: 3

Ansgar Wiechers
Ansgar Wiechers

Reputation: 200313

Quoting from the documentation (emphasis mine):

SMBIOSBIOSVersion

Data type: string
Access type: Read-only
Qualifiers: MappingStrings ("SMBIOS|Type 0|BIOS Version")

BIOS version as reported by SMBIOS.

This value comes from the BIOS Version member of the BIOS Information structure in the SMBIOS information.

Basically, this value reports information obtained from the BIOS. To modify the value you'd need to modify the BIOS, i.e. flash the chip with a new firmware.

Upvotes: -2

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