Operations Manager 2007 agents consume 100 % of CPU resources

You may notice that the Monitoringhost.exe process is consuming a lot of CPU resources in your system, here it’s some of the possible solutions for that problem:

– Make Sure that you have the latest version of the AntiVirus Software installed and you don’t have Script Scan enabled.
– Exclude the “System Center Operations Manager 2007\Health Service State” and schedule from Antivirus scanning.
– Make sure that the Windows Script 5.7 is there in your system

Windows Script 5.7 for Windows Server 2003
Windows Script 5.7 for Windows XP
Windows Script 5.7 for Windows 2000

Also check those KBs:
KB974051
KB968967
KB955360

Additionally Read: System Center Operations Manager Updates

Note: If you restart the OpsMgr HealthService, the problem may go away, and might not return for days or weeks, but there’s a good chance to return again if you don’t fix it.