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ristau77 wrote:

Nighthawk RAX 43 purchased 6/1/2022  

Cannot access internet, message trying to access Gmail or any other site: 

Your connection is not private

Attackers might be trying to steal your information from mail.google.com (for example, passwords, messages, or credit cards). Learn more

NET::ERR_CERT_AUTHORITY_INVALID

 

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You have not provided much detail about what you are doing and what you have tried to do to fix it. That makes it hard to tell where you should look to fix your problem. So we  have to fall back on generic suggestions.

Messages like this can be down to  various things. The router isn't usually one of them. People just blame that because it is there.

From time to time browsers "improve" their approach to security and add new layers of protection. Which one are you using?

Have you tried a different browser?

Another possibility is that your operating system has changed and is trying to protect you from wicked people on the Internet.

One possibility is that you could tell Windows that you are on a "private network".

• Network and Internet settings
• Network Status
• Change Connection Properties
• Network Profile
• Private

I'm told that this is rubbish advice. But it has worked for me and others in the same boat.