WMI windows serial number changed after update?

Question

It is possible that the windows serial number finded from ExecQuery(_bstr_t(L"WQL"), _bstr_t(L"Select * from Win32_OperatingSystem"), WBEM_FLAG_ENSURE_LOCATABLE|WBEM_FLAG_RETURN_IMMEDIATELY, 0, &pEnumObject);
return different number on the same machine, after an update?

Answer 1

Hi,
Yes, per searching there are a number of users updated that the Win32_OperatingSystem.SerialNumber is changing after some windows updates and following blog instructed some certain attributes that are fairly stable:
Generating a unique ID for a Windows PC
https://tewarid.github.io/2015/07/30/generating-a-unique-id-for-a-windows-pc.html

Please note: Information posted in the given link is hosted by a third party. Microsoft does not guarantee the accuracy and effectiveness of information.

 

Hope this helps and please help to accept as Answer if the response is useful.

Thanks,
Jenny