Windows re-activation after CPU change

Hi everyone,

so last weekend I change my CPU from Ryzen 7 5800X to 5800X3D. Easy peasy, everything worked just fine. Today I started my computer and it stated that windows is not activated anymore. So I tried every possible (and described) way to reactivate it (after hardware change) but it simply does not work.

A digital license should be linked to my Microsoft account, but the problem solver process states, that it cannot find anything related in my account.

In addition: there seems to be no possible way to contact support.

So how can I go on? I even tried a fresh install today... but still the same issue.

Thank you all!