Windows 11 Build 22.000.co_release.210604-1628 won't upgrade to 22543.1000 (rs_prerelease).

Copper Contributor



From a long time I tried to upgrade my Windows 11 Build 22.000.co_release.210604-1628 to Windows 11 Insider Preview 22543.1000 (rs_prerelease),but everytime I get the error "Installation error - 0x800700c1" and it won't complete. I'm not so experienced. Do you want to explain how can I fix this error ? thanks.

5 Replies
I am facing that error too. Microsoft's products are too buggy now-a-days. It is very annoying. Overall I am frustrated.

manually download iso then extract with WinRAR. run setup.exe. 

@moin1407  where have you store those files extracted with WinRAR, which folder?

Seem I am missing that repair folder, as it constantly brings only the option to install all new and losing all data. 


Der Fehler besteht immer noch. Sowohl über Windowsupdate auf eine neuere Version, noch der Weg über eine aktuelle ISO funktionieren. Treiber sind aktuell.