Severity Alarm Raised Message Snoozed By Snoozed Until
High Monitored Server - Windows Connection Failure 01/01/2012 1:13:30 PM Cannot connect to Windows host 'Minitored-host-name' : Server execution failed (Exception from HRESULT: 0x80080005 (CO_E_SERVER_EXEC_FAILURE))
Errror on Windows connection can be caused by WMI not working properly or by limited permissions of the user (QDS service).
Please make sure you can run the WMIc command against that server (from Diagnostic Server).
Also, go to monioted server's services. make sure WMI service is started, if not started then strt it up and try again