Error code

Windows 0x80070BC9

WINDOWS0x80070BC9
System Error Code· A POSIX/system errno returned when a system call fails.

What it means

The requested operation failed. A system reboot is required to roll back changes made..

Per dataset:Windows

The requested operation failed. Restart the system to roll back changes made..

Per dataset:Windows

How to fix it

  1. Restart the device to complete pending operations.
  2. set the TrustedInstaller (Windows Modules Installer) service start type to Manual/Automatic per default.
  3. run sfc /scannow.
  4. retry the update.

Not affiliated with Windows. Answer summarized from the manufacturer's manual linked above; consult that source for the authoritative procedure.