As a general rule, an up-to-date operating system is a secure operating system, and some people are terrible at updating their operating systems.That's probably why Microsoft has -- controversially -- decided to make Windows 10 an automatically-updating OS.
If that is the case then you have no further action to take.
If however, you did install that update then it can be uninstalled through Windows Update. The system may need to be restarted to complete the removal.
When a new update has been downloaded and installed, Windows 10 will prompt you to schedule a time for your PC to restart.
A small warning: Microsoft may be scrapping this ultra-convenient feature in the Windows 10 Anniversary Update.
They sent me the upgrade, but I'm running Windows 7 Pro and my system was running fine until they sent me this update that I now know how to uninstall, so thanks again!
As far as Microsoft's Media Center's, I don't even use them.
(And it's one of the reasons you might not want to upgrade to Windows 10 just yet.)If you're running a professional version of Windows 10 (Professional, Enterprise or Education), you actually can disable automatic updates using the Group Policy editor.
But if you -- like most people -- are using Windows 10 Home, you'll need to use workarounds to stave off Windows 10's aggressive automatic updates.
Windows 10 automatically checks for, downloads and installs new updates to your PC -- whether you like it or not.