Wow, this really worked for me, thank you very much. I just created an account to let you know it was useful for somebody and thank you.
I´ve been surviving without updating Windows for almost a year because I got that error nobody knows the answer. I tried fixes and strange commands whenever I wasn´t feeling lazy to do the research and not give up after a few trys.
But I never had the idea of turning off the Eset Firewall, and when turned off, updates would work. I just did what you said and yes, I remember blocking Svchost in some point because some program annoyed me with it. Now problem solved. Thank you!