Hey MylesJPM,
There is actually something you can try, it worked in 1709 but I'm unsure of its effect in 1803, but I suppose that it's worth a try.
Go to Start, type in the following: Sign-in options
Click that option. You should see a new Sign-in options window. Scroll down, and disable "Use my sign-in info to automatically finish setting up my device and reopen my apps after an update or restart".
Let me know if this does the job or not, good luck.