I excluded all the updates except one (KB2937636).
WSUS run seems to install it but with there's an error:
27/08/2016 18.17.21,55 - Warning: Installation of ..\w62\glb\Windows8-RT-KB2937636-x86.msu failed (errorlevel: -2145124329)
27/08/2016 18.17.21,58 - Info: Installed 1 updates
27/08/2016 18.17.21,59 - Info: Installation successful
[entire log here:
http://tinyurl.com/gv6shds]
FYI the command "DISM.exe /Online /Cleanup-image /Restorehealth" fails with error 0x800f081f (because of the missing source.. could it be useful to fix it?)