0X80070643
Fatal error during installation.
- Symbol / family
- ERROR_INSTALL_FAILURE
- Signed decimal
- -2147023293
- Unsigned decimal
- 2147944003
What it means here
Windows Installer or an installation wrapper reported a fatal installation failure.
What to check next
- Collect the verbose MSI or installer log and find the first actionable error.
- Check prerequisites, pending restart state, disk space, and installer context.
- Avoid assuming the final 1603-style result is the original cause.
Technical reference: Microsoft documentation or Microsoft-hosted support material