Office computer seem to automatically switch proxy server settings. We don't use a proxy server. But, to get the internet back I have to go to the upper RH corner of the internet screen (Internet Explorer) & click on the little gear, then get to internet settings, then to connections, then find that little "use proxy server" box &  UNcheck it. Then all is fine. Sometime it'll go 2-3 days, sometimes only a couple of hrs & then the internet won't open. Go to that page & sure enough, the box checked itself again.

Anyone have any ideas why this is happening? No changes have been made for at least a year, but this just started happening about a month ago. Now, in fact, it's happening more often.

Suggestions?

Thanks