Secure connection attempt to iTunes Store was unsuccessful.
There's your answer. Something on your computer/router is blocking itunes attempts at a secure connection. The most common causes are: firewalls(router or computer), anti-virus software & anti-malware software. I see your windows built in firewall is off, any other firewalls? Any anti-virus, anti-malware? If so, try disabling all of that stuff. Firewall on your router? If so, turn it off.