Self-update: UAC-aware, de-elevated relaunch, user-mode installer
Three coordinated changes so the auto-update flow works on every
existing install location.
LauncherSelfUpdater.cs
----------------------
- Probe the target directory with a write/delete of a temp file. If
it fails (e.g. install in Program Files without admin), set
UseShellExecute=true + Verb=runas on the Updater process so UAC
prompts the user once for elevation. If the directory is writable
(user-mode install or portable layout), skip elevation entirely.
- Switched from ProcessStartInfo.ArgumentList to a quoted Arguments
string because Verb=runas requires UseShellExecute=true, which
ignores ArgumentList. Paths get explicit quotes to survive spaces.
Updater Program.cs
------------------
After the file swap, the relaunch was a direct Process.Start(target).
With UAC elevation that propagates admin to the new launcher, then to
its child PROSERVE_UE_5_5.exe — undesirable. Replace with
`explorer.exe "<target>"`: explorer is always running in the user's
normal token, opens the exe via shell, the new process inherits the
non-elevated session. Standard de-elevation trick.
installer/PSLauncher.iss
------------------------
Switch from system-wide install (Program Files, requires admin) to
per-user (DefaultDirName={localappdata}\Programs\..., PrivilegesRequired=
lowest). Auto-update then never needs UAC at all on fresh installs.
Existing installs in Program Files keep working thanks to the runas
fallback above.
Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
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