When WelkinSuiteSetup-0.30.17.4 ran as an auto-update, started getting this error:
Service 'The Welkin Suite Auto-Updater' (TheWelkinSuiteAutoUpdater) could not be installed. Verify that you have sufficient privileges to install system services.
The install runs under the admin account.
This happens after choosing the install directory. It doesn't matter what directory is chosen.