Why can't I reinstall?

I tried to uninstall a program form my PC that would not start up. It would not uninstall from my add/remove programs. I went into my programs fold and removed in manually then uninstall it for add/remove programs. I downloaded and tried to reinstall and it asks me if I would like the program to be able to make changes. When I click yes nothing happens. I have tried rebooting my pc and it still does not work. I am running windows 7 64 bit.

 

It would help if you'd specify which program it is that will not uninstall / install.

Have you tried http://support.microsoft.com/mats/Program_Install_and_Uninstall

 

The program was Utorrent. Started acting up after I removed the new Utorrent toolbar that installed without me agreeing to install it.