Restarting your router and computer is the first step to do if you are receiving the error message “Windows couldn’t determine the proxy settings for this particular network”. This will shut down any open applications and reset the proxy settings to their default setting, which should fix the issue for the majority of users.
If this doesn’t work then you should try disabling any firewalls, antivirus software or VPN software which might be interfering your Internet connection. You can do this by setting the settings for each of these apps and then removing them one by one. After you have disabled all of these apps, you can try reconnecting to the Internet and test if the issue persists.
If you’re not able to solve the issue by using one of these options You may want to consider doing a full system restore in Windows. This will restore the default settings for your network, and will remove any changes that might cause the issue. This can be done by navigating to the Control Panel and then clicking on “Internet Options.” Once you’re there and you’re there, uncheck the boxes labelled Automatically detect settings and use a proxy server for your LAN. Keep in mind that this procedure will only affect your current user account, so if you’re on a shared computer you might have to repeat this procedure for other users. You can also deactivate proxy settings through the Registry Editor, however this is a little more complicated and could cause issues in the future.