We think this started after an AVG scan and delete of malware/virus. We got the message on our PC using both Firefox and IE 10. I have tried many fixes found online, including shutting everying thing down, but nothing so far has worked. There is no problem with our wirelessly connected devices and I know there is a connection to the internet (I pinged and nothing was lost). I am not a tech geek (wish I was) but I can follow directions. Any suggestions appreciated.