There are really two primary forms of failure in a hard drive, logical and physical. Logical failures are usually a result of file-system corruption. This can occur due to a virus, accidental deletion of key files or registry components, and in some cases even electro-static discharge. In most cases where a logical failure has occurred, the drive is still recognized by the system BIOS, but it will not boot. In most cases, your data should still be intact on the drive, even though it may appear to be inaccessible.

If the system BIOS does not detect the presence of the hard drive, then chances are a physical failure has occurred. Physical failures can result from a wide variety of causes. There are really two sub-categories for physical hard drive failures; mechanical and electronic. Mechanical failures usually result from a failure of the spindle motor. Spindle motor failure can result from excessive heat due to a bearing failure. The increased heat resulting from the bearing failure will expand the drive shaft and therefore seize the spindle motor. Suddenly, your drive will become inoperative. Occasionally, you will get a warning that something bad is about to happen. You may hear a loud whining, a grinding noise, even high-pitched screeches. If anything like this starts to occur, BACK UP YOUR DATA IMMEDIATELY.

Windows Media Center

A huge step forward-especially visually.

Enjoy your entire digital entertainment library in full glory on your PC or even on your TV with Windows Media Center.View your photos in a cinematic slide show, browse your music collection by cover art, easily play DVDs, watch and record TV shows, download movies, and project your home videos-then pass the remote to let friends and family join in the fun!

Today, Windows XP Media Center based-PCs are very popular all-in-one entertainment devices that you can access music, photos, TV, movies, and the latest in online media all from the comfort of the couch with a remote control.

But with Windows Vista, Windows Media Center is no longer a separate edition but simply integrated within the Windows Vista Home Premium and Windows Vista Ultimate editions.

Windows Media Center in Windows Vista features some great advancements over previous versions, including an improved user interface with easier navigation and breakthrough media visualization. Windows Media Center also offers built-in support for archiving TV shows directly to video DVDs, faster overall performance, and an improved platform for content owners to deliver new online entertainment services and experiences. Most notably for U.S.-based customers, Windows Media Center offers support for digital cable service, by means of a digital cable tuner.
Cool new experience

After starting Windows Media Center for the first time, you will be exploring your digital media in no time because the setup experience has been streamlined. In fact, Windows Media Center automatically checks your PC for media files during the setup process so you don't have to waste a minute searching for your content.

After you've started, you will notice that Windows Media Center is optimized for widescreen and HD displays-making it perfect for the living room. With the new on-screen layout of photos, music, and videos, you can see up to three times more content on a widescreen display compared to previous versions of Windows Media Center. The clean, simple look ties together with the Windows Aero desktop experience and features transparency effects and smooth animations, giving you a fun and visually stunning way to browse and experience your home entertainment. Designed for a wide range of displays and input methods, Windows Media Center is optimized for use with a remote control but also works well with other input devices such as a mouse and keyboard, touch screen, or even a Tablet PC.