Windows 10 users have reported facing error 0x8024a203 when upgrading to Windows 11.
The error can be caused by network problems, third-party software conflict, incomplete or corrupted update files, or outdated hardware.
Steps to fix the error include restarting the computer, running Windows Update Troubleshooter, deleting temporary files, restarting Windows Update services, running SFC and DISM commands, manually downloading and installing updates, and performing an in-place upgrade.
It is recommended to refer to the guide provided for detailed instructions on each method.