https://wccftech.com/windows-10-april-update-dell-alienware/

Windows 10 April 2018 Update might have seen an unprecedented growth rate, but it didn’t come without major issues. The update was notably blocked on several machines, from Intel and Toshiba SSDs to the Dell’s Alienware range.

Microsoft had confirmed blocking Alienware 13 R3, 15 R3, 15 R4, 17 R4, and Alienware 17 R5 machines from receiving the latest Windows 10 April 2018 Update. The installation could have caused a black screen issue after using the battery saver mode. If you have been anxiously waiting for the fastest growing and record breaking Windows 10 version to arrive for your Dell Alienware, it appears the Redmond software maker has finally fixed the problems.