When encountering network connection issues on Steam, please follow the steps below:
1) Check Steam Server Status
Check the Steam Server Status page to see if there is a system-wide outage.
If you encounter a timeout error when accessing the Steam site, it indicates a system-wide issue that will be resolved soon.
2) Inspect your router
Follow the procedures in the ‘Using a Router with Steam' section to isolate router-related issues. If possible, try connecting directly via a wired connection to access Steam.
3) Resolve Firewall Issues
Refer to the ‘Using a Firewall with Steam' manual to check and configure the firewall settings for Steam.
Note: If you recently installed Steam for the first time or it was recently updated, the firewall might prevent Steam from connecting to the network, even if it worked correctly before.
4) Disable Background Applications
Refer to the 'Programs Which May Interfere with Steam' section to reset, disable, or remove programs that might interfere with Steam and Valve games.
5) Check for Viruses, Trojans, Adware, and Spyware
Refer to the 'Spyware, Malware, Adware, or Virus Interfering with Steam' section to scan your computer for these threats.