Fix 0xC1900101 – 0x40021 Windows 11 Upgrade error
If you are experiencing Error 0xC1900101-0x40021, The installation failed in the SECOND_BOOT phase due to SYSPREP_RESPECIALIZE operation when upgrading Windows 11, you are not alone. This error indicates that the installation has got stuck right before… Continue reading Fix 0xC1900101 – 0x40021 Windows 11 Upgrade error