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My PAYG 3G bandwidth is vanishing at an alarming rate. Yesterday 2GB just surfing and processing email, in an hour or two. I just experienced it again, with 500MB over about an hour. I suspect either my network is ripping me off, or I have unseen downloads taking place. How do I see those downloads?

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windows/application auto updates? netstat -b on Windows, from an elevated prompt tells you which processes are using your network, and where they are connected. simple, but might help. –  Lorenzo Von Matterhorn Mar 29 '13 at 9:48

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