Update (6/22/18):
Microsoft has included a solution for this issue in the May 23, 2018 Cumulative Update (KB4100403). This solution prevents the issue from occurring when installing the April 2018 Update. Please note that this solution does not restore systems that have already experienced the issue and are currently booting to a UEFI screen. Any devices already impacted should still follow steps to reinstall the previous operating system (Windows 10, version 1709). Any devices with Intel SSD 600p Series or Intel SSD Pro 6000p Series that have installed the June 12, 2018 Cumulative Update (KB4284835) will no longer be blocked from installing the April 2018 Update.
To get the Windows 10 April 2018 Update (version 1803), we encourage you to wait until the update is offered to your device. If you’re an advanced user on an actively serviced version of Windows 10 and would like to install the Windows 10 April 2018 update now, you can manually check for updates. In the Search tab, type “Settings”. On the Settings page, navigate to Update & security > Windows Update > click “**Check for updates”,**which **** will include this resolution.