Came across this program the other day, which others may find useful, so far working very well. UnChecky : http://unchecky.com/
Have you ever felt, while installing software, that the installer tries to push additional unwanted programs at all cost? Ever missed a checkbox, and spent hours afterwards removing adware? Ever opened your browser after an installation, only to find out that you have a new homepage, a new search engine, or even a new browser? Unchecky aims to keep potentially unwanted programs out of your computer.