Spyware
While the term spyware suggests software that secretly monitors the user's behavior, the functions of spyware extend well beyond simple monitoring. Spyware programs can collect various types of personal information, but can also interfere with user control of the computer in other ways, such as installing additional software, redirecting Web browser activity, accessing websites blindly that will cause more harmful viruses, or diverting advertising revenue to a third party.

Software Updates
Microsoft Update is a Microsoft Web site that offers the same downloads that are available from Windows Update—plus the latest updates for Microsoft Office and other Microsoft programs.

When you visit Microsoft Update, the site scans your computer and gives you a list of updates relevant to your computer and its configuration. You then decide which updates you want to download and install.

Internet Cache
Often referred to as the cache, the Temporary Internet Files folder contains a kind of travel record of the items you have seen, heard, or downloaded from the Web, including images, sounds, Web pages, even cookies. Typically these items are stored in the Temporary Internet Files folder.

Storing these files in your cache can make browsing the Web faster because it usually takes your computer less time to display a Web page when it can call up some of the page's elements or even the entire page from your local Temporary Internet Files folder.