Microsoft has entirely changed their approach to updating Windows 10. Now they are releasing major builds twice a year which are much larger downloads that require longer install times with a REBOOT.
Each build will have an end of lifecycle and will cease to be supported as defined by their End of Service date, see IT Spotlight article, Windows 10 Lifecycle and the Need To Update Regularly (https://commons.lbl.gov/display/itfaq/2018/03/01/Windows+10+Lifecycle+and+the+Need+to+Update+Your+System+Regularly).
Users should know that they must regularly commit to updating their Windows 10 operating system or risk cyber threat and/or block, not to mention further increased time to update your system. Falling behind on updates could take several hours to upgrade your system resulting in loss of productivity. The more frequent the update and REBOOT, the less downtime.
To update your Windows 10 system:
Select Start button
Select Update & Security
Select Windows Update
Select Check Updates and update your system if there are updates
Note: There are optional settings in the Advanced Settings section where you can set download and reboot options to meet your workload.
Don’t forget that you should always backup your system before updating. Berkeley Lab IT provides Druva inSync for this purpose (https://software.lbl.gov/swSoftwareDetails.php?applicationID=184).
Friendly reminder it is always wise to reboot your computer at least once a week to ensure the health of your computer.