0x80070643 – Installation error

Installer failed - not clear.

Stop if unsure or if a new warning appears. Save your work before changes and ask IT before changing a work device. Never disclose passwords or recovery keys.

Determine package name and KB number.
Reboot and check memory.
Check protocols, do not blindly remove components.

Test after each step and stop when the issue is solved. Checkmarks are not permanently saved.