Action Center is actually pretty useful in Windows 10 with the combination of notifications from all sorts of sources and quick action buttons for easy access to various system related things. But if it’s one of the things you don’t really use, you can still disable it from running and popping up.
Through Group Policy
Go to Start menu and do a search for “Group Policy”, and select Edit Group Policy from the list to launch the Local Group Policy Editor. Then navigate to the following location:
User Configuration → Administrative Templates → Start Menu and Taskbar
And enable the setting called “Remove Notifications and Action Center“. The change should kick in after a minute or two. If not, reboot your computer.
Through Registry Editor
Open Registry Editor and navigate to the following location:
If there is no Explorer key under Windows, create one by right-clicking on the Windows key, select New, then Key, and name it as Explorer.
Then, create a DWORD32 Value called DisableNotificationCenter. And set it as 1.
Restart the computer and you should no longer see the Action Center.
Note that disabling Action Center through the ways described above will not get rid of the notifications that pop up from time to time when something happened. To disable those notifications, go to Settings app → System → Notifications & actions, and disable the notifications you don’t want to see anymore.