The simplest way to counteract this is head to Windows Update (in Settings Each version of a new operating system comes with its own set of backwards compatibility issues and Windows 10 is no exception.
This is actually the same as previous versions of Windows, so if you've upgraded before you can most likely do it again.
To check how much space you have left, go to My Computer (or This PC depending on the version of Windows you're running) where any drives you have will be listed.
You can see the remaining space indicated underneath each drive, or you can right click and select Properties for a clearer overview (the system drive is usually C:).
Microsoft updated Wi-Fi Sense to share less data, but switching it off is the ideal way of preventing anything you don't want happening.
To turn it off, go to the Start Menu, select Settings and click on Network & Internet, then Wi-Fi, and head to Manage Wi-Fi Settings – turn off all the options in here.
Mostly, this is a bonus but there are times when it isn't – and Microsoft's attitude towards operating system updates is one such time.