This article will help you fix the “Windows 11 Upgrade Error 0xc1900101”. You may receive a message stating “Couldn’t install this update, but you can try again 0xC1900101 when updating and installing Windows 11.”

Common Causes of Error 0xc1900101:
Outdated device drivers
Corrupted system files
Problematic application installation
Incompatible drivers causing blue screens, system hangs, and unexpected reboots
Outdated BIOS firmware