Looking for logging into the Windows 7 Key site and are not getting the correct working link for it? In such a case, you can use the links given here by searching your desired login page in the search box. If the page is present on our website then you will get all the links related to the Windows 7 Key site. After that you can login as usual with your login credentials.
https://answers.microsoft.com/en-us/windows/forum/windows_7-windows_install/windows-7-key-authenticationverification/91a7f577-41a2-434f-a4e4-18d1cc86e671
https://docs.microsoft.com/en-us/windows/desktop/secauthn/key-authentication
https://support.microsoft.com/de-de/help/4000641/microsoft-store-find-your-downloads-and-product-keys
https://support.microsoft.com/de-de/help/10749/windows-10-find-product-key
https://www.yubico.com/why-yubico/for-business/computer-login/windows-login/
https://stackoverflow.com/questions/16212816/setting-up-openssh-for-windows-using-public-key-authentication
https://kb.iu.edu/d/aews
https://superuser.com/questions/979312/private-public-key-authentication-for-windows-remote-desktop
https://support.rackspace.com/how-to/log-into-a-linux-server-with-an-ssh-private-key-on-windows/
https://system.cs.kuleuven.be/cs/system/security/ssh/setupkeys/putty-with-key.html
https://www.rohos.com/products/rohos-logon-free/
https://www.pcwelt.de/a/10-fragen-und-antworten-zur-windows-lizenz,3449874
https://www.computerbild.de/download/Product-Key-Extractor-7548844.html