The original poster neither mentions nor implies the use of a VPN...................... Windows 7—a system most VPN providers don't support well—is puzzling. NordVPN serves as a prime example of this.
The OP probably didn't mention a VPN because he didn't think it was relevant.
NordVPN claim that their VPN is actually fully supported for Windows 7 - see here.
When I accessed the MS Catalog using a VPN and switching between different servers, the text was first in Korean, then Japanese, and now Russian:
How do you explain the foreign text the OP was getting on that website?
I do however agree with your other statements. While it's of course not ideal to be running an unsupported version of Windows, current AV solutions still offer a high level of protection. Taking AVG as an example, it will provide real-time behaviour, email, URL and file scanning etc.