OpManager is running on below server ;

Physical Server Properties ;

-          In addition to OpManager ; Eset nod32, SMS application (runs as windows service ), a couple of  .net applications (office programs..), IIS 7.0 runs on the server.

-          Hp Proliant DL160 G6,  Xeon E5504 2.00 GHz 4 Core CPU, 8 GB memory.

-          Database is on different SQL 2008 server.

-          11  Server, 2  Storage, 2 Firewall and 2  Switch totally 17 device is being monitored at opmanager. Server is freezing and do not responds. when stops opmanager service it became normal.What might cause that hassle on the server ? Thanks.