Microsoft has halted deployment of the Windows 10 April 2018 Update for certain types of Intel and Toshiba solid state drives. Windows PCs using Intel SSDs would often crash and enter a UEFI screen after reboot. Users of Toshiba SSDs reported lower battery life and drives becoming very hot. Microsoft did not provide an estimated deadline for when it would fix the issue with Intel or Toshiba. It expects to have a solution for devices using Toshiba drives in early June, but not when it will fix the problem.
Source: https://www.bleepingcomputer.com/news/microsoft/rollout-of-windows-10-april-update-halted-for-devices-with-intel-and-toshiba-ssds/