After update to 18252 Online update crashes

The next part of troubleshoot W10 upgrade issues gets a little more detailed and in my experience murky.  I have used this tool, setupdiag,  https://blogs.technet.microsoft.com/yongrhee/2018/04/05/windows-10-new-tool-setupdiag-tool-diagnose-problems-with-win7win8-1win10-to-a-win10-upgrade/

with a good writeup here 

https://www.ghacks.net/2018/04/05/use-setupdiag-to-diagnose-windows-10-upgrade-issues/

The tool essentially looks at all your upgrade logfiles and gets down to parsing what the issue is.  I have had a few errors. Run yours and see if you can get a more detailed failure we can run down.  Ones I have seen include:

Error: 0x8007042B - 0x60015

and a few 

SetupDiag was unable to match to any known failure signatures.

Some basic troubleshooting issues include checking the eventvwr for anomalies, extra or unknown things in the Device manager, USB compatibility issues , antivirus, SFC/Scannow, DISM and even things like firmware version and order of operations in download of windows updates may happen. 

Case in point I had an upgrade to a new windows insider version and a firmware upgrade show up at the same time on my surface pro 3 and these 2 conflicted and never worked themselves out, always having the firmware and update both try to apply at the same time.  I used the reset windows update and then made sure I only did the firmware first - after that the update went.  I have also experienced where a build would not apply and I had to skip that build until a newer one was released.  Of course moving back to base W10 and not an insider build is an option but not ideal.  Not a great answer and not sure we will ever find solutions for every issue.  Some combination of these techniques has usually had results.  Its also possible that the failure is a vendor driver or piece of software that the upgrade chokes on.  Any chance you can provide an error?

Murray