I will give RRUZ credit for this, since he / she at least put me on the right path, but since they did not send an answer-response (just a comment), I can not click on them to get a loan.
Basically, due to the working environment in which I work, project directories are configured in a βnon-standardβ way. There was already a copy of wbemuuid.lib in another directory, which was the wrong version (not x64), and this directory was higher in the list of included libraries, so it never got into the right directory of the Windows Platform library.
So, if you have ever had problems with x86 and x64, as well as with the library, check your directories and check them as well.
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