Not a one time fix, but not every time you turn on your computer either.. It is amazing what a complete shutdown will do sometimes for electronic equipment..
You might also try cleaning out your cache, cookies, history, etc. on your computer and shutting it down completely as well, once in a while. That won't fix your runaway data consumption but it will make your computer run better. There are arguments for and against defragging hard drives but that will sometimes make them run like new.
It's funny how they used to say you didn't even need to reboot the old XP operating system, but a reboot and/or complete shutdown once in a while did wonders for it.
We have even had luck bringing laptops with black screens back to life by removing the AC power, removing the battery, holding the start button in to completely drain the system of any charge, and simply putting them back together.
The theory doesn't matter. It is what works that counts.
Nothing ventured, nothing gained! It beats waiting and watching your meter nose dive, in my opinion.
Which modem are you using?
Charles McCool explained to you 4 weeks ago in this thread that the old "Use Meters" leaked data and that you should install the latest one.
Did you do that?
You can take a screen shot by holding down Ctrl-Alt-Print Screen. This puts the image in the clipboard. Then you must open it in a photo editor and crop the image down to the size of the meter. Then save it as a .jpg and send it.
Much simpler to go to Accessories in the start menu and use the "Snippet tool" which is self explained.