This answer probably doesn’t matter, but since this post appeared in the active list, and I remembered that the andbourse from the windbg team answered a similar request and provided a temporary workaround in which I decided to publish links and contents here from the lists osronline
http://www.osronline.com/showThread.CFM?link=278979
aluhrs
xxxxxx@microsoft.com Registration date: November 16, 2015 Posts in this list: 13 Gflags.exe cannot start A known issue that will be fixed in an upcoming release. You should be able to use the version of GFlags installed with any of 8 or 8.1 kits, or a copy of gflagsui.dll from them.
source
share