If you have Windows 10 be aware that you must stop the updates from automatically downloading. This is not as simple to do as it used to be.There's a discussion about Windows 10 here -
http://www.rv.net/forum/index.cfm/fuseaction/thread/tid/28405823/srt/pa/pging/1/page/1 Also we had a problem with a computer that we just bought which has Windows 8.1. It was using quite a bit of data just idling. We found a solution here -
http://www.tomshardware.com/answers/id-1855363/hour-idling-windows-windows.html Skip down to the last post.