I have a laptop running windows 7 64-bit. It was off the internet over the weekend when I replaced my modem (the router is the same). Now I can't get firefox to connect. My desktop on the same network connects correctly and the router reports that the laptop is connected to the router. I took the laptop to a different wifi location and had the same connection problems. It also has the same problem with a hardwired connected to the my router.
When I open firefox to google, I get a message,
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Your connection is not secure
The owner of http://www.google.com has configured their website improperly. To protect your information from being stolen, Firefox has not connected to this website.
This site uses HTTP Strict Transport Security (HSTS) to specify that Firefox may only connect to it securely. As a result, it is not possible to add an exception for this certificate
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http://www.google.com uses an invalid security certificate
This certificate is only valid for the following names,
register.be.xfinity.com, register.xfinity.com
the error code is SSL_ERROR_BAD_CERT_DOMAIN
I think the issue is that the domain name and certificate name don't match. It's almost like it's looking for the google certificate and finding an xfinity certificate. I can post the certificate if that would help.
I have also had a strange situation where there is a popup over the network icon in the toolbar that says something like, "additional steps may be required to connect, click to open your browser". If I click, I am taken to what looks like an xfinity login page and says something like that I have to login to xfinity to connect to the internet. I have never seen anything like this before. This computer has operated on this local network for many years.
I have seen certificate issues when there was a problem with the clock, or something like that, but I checked the date, time, and timezone and they are correct.
Has anyone seen this? A google search didn't reveal anything similar. I have cleared the cache, restarted, and run some malware scans.
Any suggestions as to what to try next? Please let m know if any additional information is required.
LMHmedchem