Individual programs in Vista can be run in a "compatability mode" for any of the earlier Windows operating systems.
By looking in your C: drive, and going to the CComWP folder you can find the CComWp icon that starts up CCom.
If you click on it once with the left mouse key it will highlight. Next right click on it and and click on the Properties option.
Finally, click on the Compatability tab and you should see the Compatability Mode drop down bar where you can choose the mode that you want CComWP to run in. Chose Win XP, Win 2000, etc....whatever you think is best.
This will probably make CCom less likely to crash on a Vista machine.
I've personally never used CCom on a Vista machine, so im really not sure how well CCom likes being run on Vista.
Hopefully, this will give you guys running Vista a better chance of getting CCom to work properly.