Software...

Watch when you do the install. Just don't hit the "next" button constantly to get the program to install. Look at each screen and usually there will be check boxes marked to install, Bing, make Bing your default, Install Ask, Make Yahoo your homepage, etc, etc, etc, Uncheck them.

You can also go to programs (uninstall) and find all the "toolbars" that have installed and uninstall them.

IObit along with CCleaner have un-installers build in.

CCleaner does well as it allows you to save Cookies that you need before it does a cleansing of your files/reg.

 

you can sometimes go to the control panel and remove the unwanted junk