Take a backup of your current OpManager database after stopping OpManager service. In addition to the database backup, we also recommend you to take OpManager folder backup.
Refer the blow articles for taking backup:http://support.manageengine.com/sd/AddSolution.sd?solID=1204
1.Stop the ManageEngine OpManager Service through Services window (Start > run > Services.msc)
2.In task Manage kill OpManager "java.exe" and "mysqld-nt.exe" processes if running.
3.Disable any Antivirus running on OpManager server (can enable it after upgrade).
4.Download OpManager upgrade ppm from the link below: http://www.manageengine.com/network-monitoring/service-packs.html
5.Run the script 'UpdateManager.bat from <opmanager-home>/bin folder through OpManager server command
prompt with Run as administrator privilege, this opens the Update Manager tool.
6.Click "Browse" to select the Upgrade Pack file (the .ppm file that you'd downloaded) > Click "Install"
7.Once it is finished click "Exit"
8.Start OpManager service and make sure everything works fine.(Note: If you are upgrading multiple PPM files , it is mandatory to start OpManager service after every PPM upgrade before proceeding to the next PPM)