In Windows 7, the dropper seems to be behaving according to the mouse setup.
In my computer, Colorcop dropper work in normal fashion, picking up colors
while the mouse pointer moves around. It doesn't have to stop to get the color code.
Please change a few settings in your mouse pointer movement in your mouse program.
I don't remember now what setting it was, but after the change, it worked in the normal fashion.
Somewhere in this CC blog, there's a comment in which I explained it more in details.
It was a long time ago and I don't know how to find it.
It's not Windows 7. You will be able to get it fixed soon or later.