But some apps have company servers that fail and stay down for a time.
I'd watch that sevenforums.
I have a system running Windows 7 x64 and for some time now I noticed that some apps (like Seagate Registration, Zoomplayer Install Center) can't connect to the internet. Otherwise everthing else connected OK (eg Firefox, IE 11 etc).
I have tried with the firewall disabled, UAC off, and still had the same issue for these two apps. I have not been able to figure out what is blocking some but not all apps.
I have tried in Safe Mode as well with the same issues.