It should be a minimal issue, bandwidth are more of a floating use per 24 hour period, if you average over X amount the speed gets dialed down. Windows updates if they are regularly downloaded are around 30-50MB in a given week. Trying to stream HD movies OTOH will hit that cap in a big hurry.
One of my customers we sat down and calculated out he could average 250MB a day without getting his speed throttled, thats alot of web browsing.
They slow down your internet access making it harder and harder to hit that cap. Some providers also allow you to pay a extra and get more breathing room.
You can turn off automatic updates on Windows 10 but they’ve kinda hidden the option. Set the internet connection that you use to be a metered connection and Windows will not use it to automatically download updates.
I upgraded to Windows 10, and found that automatic continual updates were killing my internet speed. But a quick web search turned up the option of setting my connection to “metered connection,” which fooled the OS into thinking that I have a data cap. BAM, the profligate updates stopped, and my internet speeds were instantly back up to snuff. They don’t make it easy to find, but it works like a charm.
I’m not sure about the direct upgrade, but I did download the ISO for Pro (to burn to DVD), and that came in at 3.12GB.
As far as the automatic updates are concerned, I’ve not really noticed a lot of difference since upgrading one of my laptops. I’m on a 15gb/month 3G connection so have to keep an eye on things, but so far so good.
Usually the way you handle updates with satellite internet is that there’s a few hours in the middle of the night where downloads don’t count towards your bandwidth cap. (At least that’s the way it works with HughesNet. I assume the other satellite ISPs have something similar since occasional large updates are really unavoidable these days.) At least with Windows 7, you can tell Windows Update when to start downloading stuff. The only risk there is if it’s a really big download it might still be going after the free hours are over, but for most routine updates it works just fine.