Yahoo Toolbar is a free, customizable toolbar that lets you navigate your favorite sites and search the Web from anywhere. Yahoo Toolbar also includes features like Pop-Up Blocker (Stop most types of pop-up ads before they pop up.) and Anti-Spy (Find and uninstall programs on your PC that may be considered spyware.). Customize your toolbar and save your bookmarks online for one-click access from any computer.
Features:

Search from anywhere on the Web
Instantly save and "re-find" pages with My Web. Learn more
Discover and add fresh content to My Yahoo! Learn more
Customize and access your Toolbar from any PC
Protect yourself from spyware with Anti-Spy for Windows