Modern Setup Host has stopped working while installing Windows 10 Tech Preview
Trying to upgrade an existing Windows 8.1 Pro installation to Windows 10 Technical Preview (build 9926) (via Windows Update). After Windows Update downloads installation files (over 2GB), the upgrade begins, but soon after it fails with error:
Modern Setup Host
Modern Setup Host has stopped working
A problem caused the program to stop working correctly, Windows will close the program and notify you if a solution is available.
Windows Update would show that the update failed and try to repeat the process (with the same results). Windows system and application logs did not provide any clues.