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docs(readme): recover a Windows update that fails with 1612/1714/1603

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The old version's cached installer is missing, so Windows cannot remove it.
Re-caching it with msiexec /fv on the same-version MSI fixes both updating
and uninstalling (reproduced and verified on Windows 11, #3254).

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
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Chad Elliott
2026-10-29 02:45:12 -05:00
co-authored by Claude Opus 5.5
parent 77c0a6adfa
commit 40c3a09dec
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README.md
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@@ -570,6 +570,14 @@ option to start it. For unattended installs: `msiexec /i lightcraft-<ver>-window
A silent install is per-user by default. `INSTALLFOLDER` chooses the folder, not who it is installed for;
add `ALLUSERS=1`, from an elevated terminal or deployment tool, for an all-users install.
**Update or uninstall asks for an old `.msi`, or stops with error 1612 or 1714?** Windows removes the installed version
with its own cached copy of that version's installer; if the copy is gone, it asks for the original file and stops
(an update then ends with error 1603). Download the release MSI of the version and build you have installed from
[all releases](https://github.com/storytold/lightcraft/releases) and run
`msiexec /fv "<path to that .msi>" /qb+ /norestart`, approving the permission prompt if Windows shows one. That restores
the cached copy; then retry the update or uninstall. Opening the MSI, or choosing Repair or Uninstall on it, may still
fail. Error 1603 has other causes too; if this doesn't help, open an issue with the error message.
### macOS
| Build | File | Notes |