I use Firefox.
go to control panel, the add remove programs, and remove yahoo.
get into control panel and remove the yahoo toolbar if it does not work get into registry and find yahoo toolbar and delete all the values
Right click on it and select "Delete".
I am sure you can go to one of the pull downs to adjust your toolbar. I am on mac today so I can't help, becuase this machine is backwards!
toools>>internet options>>programs>>manage addons>>disable Y! toolbar
If u want to remove it completely then u just go to control panel, add remove programs and remove it. If u jus wanna hide it from view then u right clik the end of the toolbar and unclik yahoo toolbar
you see that gray area near your address bar? well.. righ-click there, and then uncheck "yahoo toolbar".
right click and press "yahoo! toolbar"