I understand that you are facing issues in signing in as a Windows Developer in Windows Partner Center. I suggest you to refer the article Partner Center account FAQs and see if that helps
However, as the issue is related to Partner Center, we have a dedicated support team to look into this for you. I suggest you to post your query in MSDN forums, where we have participating developers and support professionals who are well equipped with the knowledge on this query to assist you with the appropriate details.
Regards,