We have seen a rash of these problems on Windows Server 2003. Research seems to indicate the problem is related to the installation of Windows Server 2003 Service Pack 2 (SP2).
The simplest fix we have found is this:
- Open a Command Prompt
- Run the following commands
- CD %windir%\PCHealth\HelpCtr\Binaries
- start /w helpsvc /svchost netsvcs /regserver /install
The service should install and start automatically.