WMI is not reporting hardware information to some applications (like Citrix EdgeSight or HP Proliant Support Pack, for example). Event Viewer will show the following error:
Windows Management Instrumentation ADAP failed to connect to namespace \\.\root\cimv2 with the following error 0x80041002
Rebuild WMI. Create a script with following lines and run on affected server:
cd /d %windir%\system32\wbem
for %i in (*.dll) do RegSvr32 -s %i
for %i in (*.exe) do %i /RegServer
Run %windir%\system32\wbem\wbemtest and click Connect button. And connect to root\cimv2 namespace, to verify is working.
If still not working, run following command to reset WMI to initial state: