Immediately after version 1803 becomes available through this tool, you can download and install the Windows 10 April 2018 Update using these steps:
1.Download the Media Creation Tool from the Microsoft support website clicking the Download tool now button.
2.Double-click the MediaCreationTool.exe file to start the process.
3.Click the Accept button to agree to the terms.
4.Select the Upgrade this PC now option.
5.Click the Accept button again to agree to the applicable notice and license terms.
6.Click the Next button.
7.Confirm the Keep personal files and apps option is selected. (If it's not, click the Change what to keep link to select the option to prevent losing your files, apps, and settings during the process.)
8.Click the Install button to begin.
Once you've completed the steps, the Media Creation Tool will take over and complete the installation of the Windows 10 April 2018 Update on your device preserving your settings, apps, and files.
If you come across any issues, you can also use the Media Creation Tool to create a bootable media to go through the upgrade or clean install of Windows 10.
Microsoft is always proactive in making available the new installation files using this tool, but sometimes, it could take a few days until a new version can be downloaded using the Media Creation Tool.
The video of how to upgrade from windows 7 to windows 10: