Microsoft will officially release Windows 10 Creators Update on April 11, the same day it will retire Windows Vista. Users unwilling to wait that long can install it starting today, April 5, using the Windows 10 Update Assistant. The tool is available for download via the Microsoft site, albeit some users reported still getting an older version for download, which don’t install Creators update. Users should keep in mind that the whole update process usually takes at least one-two hours, as their computer needs to download and then install such a bulky update package.
Source: https://www.bleepingcomputer.com/news/microsoft/install-windows-10-creators-update-starting-today-with-this-microsoft-tool/