Windows 8 Laptop Consumes Way Too Much Cellular Data

We have a field Tech that carried an XP Laptop connected to the Internet by a AT&T Data Modem.  When the XP Laptop died we replaced it with a Windows 8 Laptop, again connected to the Internet with an AT&T Data Modem (same USB device as before).

The tech uses the laptop to look up manufacturer's data as well as check in with POP3 Email on a regular basis.   Within 3 weeks of switching laptops AT&T gave us notice that we were about ready to blow through the 10 GB of data on our plan.  

The tech swears that he's not using the computer differently than he did the XP laptop.   I'm running the same version of Office 2007 on both laptops.   We have no Cloud Drive connections on the new or the old laptop.    What is driving our data usage up with the new laptop?   We never used more than 4 GB with the old XP one.   Is Windows 8 fundamentally different to the point where it consumes much more Internet bandwidth than Windows XP?  Is there anything that we can do to throttle this computer's appetite for data?

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Gary CaseRetiredCommented:
See the first answer in this post -- it has links to setting up your internet connection as a metered connection, and then limiting the usage of this connection by the tiled apps (which is likely the problem you're encountering).

Note also that any of the "Metro" apps continue running once used unless you explicitly shut them down with Alt-F4.    This could also be a big user of bandwidth.

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Sikhumbuzo NtsadaIT AdministrationCommented:
....I would also make sure Windows Updates are disabled.
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