Whether or not you are in a domain environment shouldn't effect your ability to use a custom image. Not to get into an argument about the benefits of imaging, but updating 400 tablets by hand...

I found very similar results when using the powershell suggested by this thread. Firstly, if this is an image I'd highly recommend using a clean version of Win10. It looks like you are using the OEM...

Thanks lx07,

After further research, I came across the same solution on my own. The following link does a fantastic job of explaining Start Layout customization:
...

Had the same problem as BryanP. The script would not remove all of the live tiles. No matter what I tried, especially annoying ones like Twitter and Candy Crush Soda Sage were always left behind.
...