How do I fix Steam Internet problems?

When you encounter the error, the first step that you can do is to restart your computer. A simple restart can clear up the software crashes, driver issues and reset your network settings, which can probably fix the Steam not connecting error.

How do I know if my firewall is blocking Steam?

Go to start > control panel > system and security > allow a program through windows firewall. Then just find steam, and make sure the check mark box is checked, and then it will be let through your firewall.