a number of possibilities here, and I think you are going to have to research it yourself and eliminate possible problems one by one, using Google to search.
For example, Googling WMI Idle lists some possibilities, one of which is a problem with Nero Scout. If you have that installed on your system, then that would be a good place to start;
That same article mentions Microsoft Communicator, something I have not heard of before.
Googling just WMI lists this Microsoft article, and that tells you what WMI is and does, but whether it will help or not I am not sure. (Note, it seems to be for Windows 2000);
On my own system, (XP Pro SP3), looking at the Services console I see that WMI, Windows Management Instrumentation depends on RPC, (Remote Call Procedure), and has 'dependants' of the Windows Security Center and the Windows Firewall/Internet Connection Sharing. My own service is set to automatic.
That could be significant on your system. Are there any problems with your Security Center, (Control Panel > Security Center), or is the system sharing an internet connection with another computer?
There again, my Services Console shows a further WMI, called Windows Management Instrumentation Driver Extensions. Here the service on my system is set to manual. But in my own brief research I see both these WMI services are for Windows 2000, and little is said about Windows XP. I am not sure why that is.
As you can see, this seems to be a complex area. I think you should also check your Event Log, (Start > Run > eventvwr.msc), and see what errors are listed under System and Applications.
Hopefully others here will have better ideas.
I started to get a box telling me WMI idle, program is shutting down, then program is not responding every time I try to shut down windows after I reinstalled XP. I then have to manually close it.
I am running XP sp3, my system is a Pentium D 3Gig, with 3 Gig of RAM, 160 and 250Gig SATA drives plus a 120 IDE drive (for backing up) and a Geforce 8400 GS graphics card.
This doesn't seem to be a major problem, but is a pain in the rear.
Any help is welcome.