I have two identical Dell E6420 laptops that I have upgraded to Windows 10. After the upgrade I put a fresh install of Windows 10 Pro and everything worked great. Until I wen through and ran all of the updates.
Made it fine through the 1607 update. But I believe it is the last big developer update that took them out.
Before the final install I made sure to update the Bios to the A24 to make sure that was not the issue.
Any ideas on were to look next?
Thanks for the help!