What update?
Windows 10 - 1803 most likely. Need to be sure.
Family member just had a window pop-up saying that their Windows 10 system was to be updated. 5GB download.
They only have satellite service. Frequent interruptions and bad weather has made it all worse.
Very slow and the update is likely to take hours. Even with no other network devices online.
What service do you have and what service levels do you have?
The update may indeed take a long time.