Yea it does flash quickly, that's what it is flashing though, explorer is not really dark, it looks like just some poorly added layer or something over the white explorer
This is the bug with pile of steaming garbage called Intel HD Graphics and it's drivers. This white flashing bug is not present on Nvidia or AMD GPUs.
They will be used by WU or by manually running the scripts, @abbodi1406 published a few official builds back, to upgrade using an ESD directly.
I am using RS2 version. I downloaded the files in the links to the desktop. Double-clicking on the files does not work.
The commands, @abbodi1406 posted them probably in the ESD repository. https://forums.mydigitallife.net/threads/windows-10-esd-repository.59082/page-84#post-1418703