Most likely WMI is corrupt on the scanned machine, you can repair it using this link: http://www.lansweeper.com/kb/47/How-to-repair-a-corrupt-WMI-installation.html
Most likely WMI is corrupt on the scanned machine, you can repair it using this link: http://www.lansweeper.com/kb/47/How-to-repair-a-corrupt-WMI-installation.html