Hi folks
not sure if it was because of the GUI things I installed on previous version of Windows but starting the UBUNTU subsystem I get "automatic update of Linux subsystem " and it's been taking longer than my Windows 10 update to 1803.

SO I'd re-commend -- uninstall the Linux subsystem
do your W10 update
re-install W10 Linux subsystem
re-install ubuntu desktop
re-install GUI programs for Ubuntu desktop

This will probably be quicker than waiting for the standard built in update to finish !!!!

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Cheers
jimbo