Add-on are programs that extend the functionality of Internet Explorer to perform a unique task, such as provide search toolbars or display Flash content. In most cases, add-ons are useful, but sometimes poorly built or old ones can slow down your computer, cause system crashes, or invade your privacy (such as Spyware or Adware that are sometimes deceptively installed). To help you work with add-ons, Internet Explorer includes the Add-on Manager, which provides a list of add-ons currently loaded or used by Internet Explorer. You can use the Add-on Manager to individually enable, disable, or update add-ons. The Add-on Manager can also detect add-ons related crashes in Internet Explorer and displays an option to disable it.
Timesaver:
In Internet Explorer, click the Tools menu, and then click Manage Add-ons.