Dear Paul,
I have now read the KB article. However, the article refers to a run option in the start menu, which, as far as I know, does not exist in Windows 7. Accordingly, I cannot check the existence of the certificate by that means. Also, I still do not know how where to download the certificate from the website, nor where to download it to, as I do not not know how to access the list of certificates. Is there no other way of checking the existence of the certificate? Or can I trust that by running all the Windows updates I already have the certificate?
Suvi