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OpenDNS and encryption issues, cannot access certain websites
Apologies if this is in the wrong section.
I stopped by my Dad's place yesterday for a few minutes and he's having these issues on his old Dell laptop, win7, not sure of any other specs as I just stopped in.
When he tries to access certain sites like Facebook he gets an error saying OpenDNS is blocking this site, contact the network administrator. However he hasn't installed or set up OpenDNS, and he is the only person who has access to his internet connection.
Also, when he tries visiting sites like Gmail, he gets an error message saying this site isn't encrypted, someone may be trying to hijack his details or something like this.
Both of these issues pretty much popped up overnight about a week ago.
He's restarted the router to no avail, not sure what it could be. He has a free version of AVG installed and that's about it.
Any help would be greatly appreciated. I couldn't find much on the OpenDNS forums about this. I think the main issue is he hasn't set this up himself.
Thanks!