The most likely issue is that the web site now requires secure connections to use newer TLS protocols.  Windows 7, if not specifically updated, did not contain the definitions and services to use TLS 1.1 or 1.2.  Windows 10 did come with these definitions and services. You can use this link to give you a starting point to understanding the possible issue and how to resolve it. Update to enable TLS 1.1 and TLS 1.2 as a default secure protocols in WinHTTP in Windows