1. Check if your browser can connect to other websites.
2. Check if your internet connection is working properly.
3. Restart your modem or router.
4. Clear the DNS cache on your computer.
5. Check the DNS settings in your Internet Protocol (IP) properties.
6. Flush the DNS resolver cache.
7. Check for a possible Proxy setting in the browser.
8. Disable any security software that may be preventing connection.