A few weeks ago I deleted several programs I was no longer using, e.g., Yahoo messenger. I don't recall what programs I removed. Since then, I get an error message every time I boot up. It says, "At least one component is missing. Try reinstalling the application. If the problem persists, contact our technical support (0001)" I can x out the box and use my pc normally and it doesn't pop up until the next time I boot or re-boot. I don't know what program it is referring to, but I want to completely get rid of whatever remnants are still there, causing the error. Is there a utility or some other way I can "seek and destroy" the unwanted files?