Double click mouse problem - Windows 98 SE

[mcvickj]

I ran into a strange problem today on a friends machine. His mouse will not allow a double click to do things like launching apps or maxamizing a window, ect. He purchased a new mouse thinking the old one was bad but that did not take care of the problem. I tried setting up the mouse as a left handed mouse which would make the right button as the main button but that didn't work either. I am trying to keep reformatting the system as a last option. Has anyone heard of such a problem?