Title should say MB not Mb. Typo. I have satellite-based internet ( slow and unreliable but still the best available here ). My "service" and billing is with DISHnet but in my case they farm it out to Excede ( Viasat ). Anyway, I have a 10 GB monthly limit from 8 am-2 am and another ( rarely used ) 10 GB from 2 am-8 am. That is just over 300 MB per day in each of the two time periods. In order to manage my data usage I have software ( Networx ) which monitors all eight of my home computers, collectively and separately ( # 26 through # 33 ) ( # 1 through # 25 are all retired ). If the collected usage reaches 300 MB in one day, I get an alert from Networx. I do not monitor or measure satellite modem updates. I was only using two computers today. One ( Computer #27 ) for email and browsing, the other ( Computer #31 ) for editing. Both were connected to my LAN and to the internet, but on the one ( # 31 ) I did not run any software that needed the internet. I have Windows 7 with updates turned off ( my choice ). Likewise no automatic updates for any installed software except for Webroot. Sometimes my security software ( Webroot ) will update, and I will see the data usage. No problem. But this was a mystery. So I looked at the Networx data and learned that between 2-3 pm on # 31 something used 130 MB of my data limit. And between 9-10 pm on # 27 likewise. That is 260 MB of data. The IP addresses for both were similar and both belong to Viasat. I don't mind them updating the modem firmware but they have no business accessing any of my computers. So. I have now blocked the entire range of offending IP addresses ( inbound and outbound ) and will see what happens. My internet is still working. Now I suppose it could be something other than Excede-Viasat pretending to be Excede-Viasat? Or possibly something that I need and would approve of if I knew what it was. But dang, I cannot afford 130 MB of data usage per computer whenever "they" like. Obviously I have trust issues.