Windows 10: Upgrade from Win7 fails - error 'Replicate_OC' 0x8007001F

HI GUYS! ( Long time no speak! *Smile )
I spent a LOOONG day at work some time ago trying to upgrade a Win 7 Pro machine (Lenovo desktop).
The machine was delivered with the standard downgradable package and I installed Win 7 Pro, since it would have been the only Win10 machine in the office, and it was acting as fileserver for the rest of the office.

All the other machines are now running win 10 (or have been replaced) so the time has come to get this one up to WIN10.
During the course of that day and another I tried multiple times to install Win 10 from a USB stick, with no success - every time, it gave me the above error (or a minor variation of it).
The same stick was used to upgrade another machine later - so I know the USB was OK.
Since the machine was built for Win 10, and there's no new hardware attached, I can assume that there should be no problem with the hardware (it runs Win 7 perfectly, and hasn't blue-screened ever as far as I know).

Can anyone offer some insight as to what I'm doing wrong?

Is there a trick with Lenovos? ( I see that there are a few horror-stories around, but they mostly seem to revolve around machines built for Win 7)

A clean install is pretty much a no-no, as the machine is in use 5 days a week, 9-10 hrs a day (and I'm not going to work nights or weekends) - and there's a large quantity of data on it that would need to be transferred over the internal network and checked, and then transferred back and rechecked. The necessary rebuild would take more than a day in any case *Sad

Last time I tried the upgrade it took an overnight copy session to push the data across to a relatively empty drive on another machine. as backup in case of disaster - I can do that again, but it's a PITA!

:)

 

Error code 0X8007001f

I followed the steps but I got the same error message as I got when I tried the suggestion of DaveM121 -- 0x8007001F-0x20006

The installation failed in the SAFE_OS phase with an error during the REPLICATE_OC operation.

 

the installation failed in the safe_os phase with an error during replicate_OC operation 0x8007001F -0x20006

the installation failed in the safe_os phase with an error during replicate_OC operation 0x8007001F -0x20006

win 10 pro does not let me upgrade anymore from 1703 for the last 2 years

 

Error code 0X8007001f

I followed the steps but I got the same error message with more details -- The installation failed in the SAFE_OS phase with an error during the REPLICATE_OC operation. That sentence is preceded with the error code 0x8007001F-0x20006.