This week, a client brought me a Windows 7 PC which refused to upgrade to Windows 10, despite their having reserved a license long ago for the OS and attempting to install it repeatedly. The error message they were receiving was:
0x8007001F – 0x20006
The installation failed in the SAFE_OS phase with an error during REPLICATE_OC operation
My usual remedial measures, after poring through setup error logs and all that fun stuff, were completely unsuccessful in this instance. Myriad internet searches also turned up lots of other people with the same problem, but no actual solution. Everyone simply wiped/reinstalled Windows.
Some of these attempts included:
- sfc /scannow
- BCD rebuild
- Boot parameters rebuild
- System (boot) partition rebuild
- Filesystem checks, etc
- Permissions repairs
Nothing at all worked. Eventually, however, I stumbled across a solution almost too simple to seem likely to work: an in-place upgrade of Windows 7. In other words, in colloquial terms, a conventional “repair install”.
All this involves is to grab Windows 7 install media matching the version installed and perform an “upgrade” process right from within Windows. Once complete, I had to reenter the Product Key and reactivate – so make sure the sticker is legible on the particular machine you’re working with. If it isn’t, specialized activation backup/restore methods will be required to continue with the process and eventually the Windows 10 upgrade.
After this, everything worked perfectly. The W10 upgrade process was smooth, and the client is now happy as a clam!