Temporarily disable your antivirus

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Some antivirus settings can also cause connection problems. To test that possibility, simply disable it temporarily. First, make a backup of your system. Then follow these steps:

access Task Management;
Look for your antivirus icon in the list of applications;
look for the "Disable" option to disable software initialization;
Restart your computer and check if the error in Google Chrome "can't access this site" has disappeared.
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Clear DNS cache
If your DNS is outdated , you can manually clear your cache to fix any issues that may be causing. The method is simple, just access the Command Prompt:

Press the Windows + R keys simultaneously on the keyboard to open the Run utility;
type "cmd" without the quotes and press the "Enter" key on your keyboard;
paste the command ipconfig /flushdns and press the "Enter" key to execute it;
Close the command prompt and check if Google Chrome still shows the "ERR_CONNECTION_REFUSED" error.
Change DNS address
You can also change the DNS server to try to resolve the "this site can't be reached" error. Google's DNS is a trusted public service, and by doing that you can even get better internet speed on your device:

access your control panel;
Click on "Network & Internet Options";
choose the “Network and Sharing Center” option;
Click on "Change adapter settings"
Right click on your current connection and select "Properties";
Look for the “Internet Protocol Version 4 (TCP/IPv4)” option and click “Properties”;
enter the Google server addresses (8.8.8.8.8 and 8.8.4.4);
Press Ok and restart the computer.

Remove extensions from Google Chrome
You often add unnecessary extensions, which belgium phone number list drain your system resources and can cause incompatibilities that cause errors , just like plugins in WordPress . It is recommended to disable all installed extensions in the browser to check if the error is resolved:

access Google Chrome;
Click on Settings, the section represented by the three dots in the browser;
click on "More Tools";
click on "Extensions".
You can also use another way to access those settings: just enter chrome://extensions/ in the browser address bar and press the Enter key. After entering the installed extensions page, click on the "Remove" option and restart the browser to check if the error has been resolved.