There are two possibilities to stop the Inspector. The first one is to stop it with the services window from the cockpit. In this case, the Inspector will be set to “Offline”. That means, all running crawls will be finished and no new crawl will be started. The other possibility is to stop the Windows Service itself. In this case, the Inspector will be interrupted and all running crawl will also be interrupted. They will stay as running in the cockpit. After you restart the windows service the crawls will be reset automatically.
Please only use the Stop functionality in the services windows from the cockpit.