Lansweeper checks WMI for this information, not the client machine's registry. Could you contact support@lansweeper.com and provide us with:
- Program Files (x86)\Lansweeper\Service\Errorlog.txt, as present on your Lansweeper server.
- Screenshots of the problem machine's Lansweeper webpage. Show us the following sections: Summary, Config\User Info\Last Logon, Scan Time and Errors (if this tab exists).