Steam-fatal error.

Hello, I have tried to launch my steam multiple times and it wouldnt connect to the internet, it gave me the option to run offline but that wasnt ideal for what I wanted to do. I then uninstalled steam and tried to reinstall it to see if that would help, but during the reinstallation it came up with this message "steam-fatal error. Steam needs to be online to update. Please confirm your network connection and try again." but everything else on my computer can connect to the internet just fine. How do I fix this?