Keep Windows Defender definitions up to date

Windows Defender definitions are files that act like an encyclopedia of known spyware and other potentially unwanted software. Because spyware is continually being developed, Windows Defender relies on up-to-date definitions to determine if software that is trying to install or run on your computer is spyware or potentially unwanted software.

Windows Defender works with your Windows Update settings to automatically install the latest definitions. For more information, see Change how Windows installs or notifies you about updates.

 To automatically check for new definitions before scheduled scans (recommended)

1. Click to open Windows Defender.
2. Click Tools, and then click Options.
3. Under Automatic scanning, make sure the Automatically scan my computer (recommended) check box is selected.
4. Select the Check for updated definitions before scanning check box, and then click Save.  If you are prompted for an administrator password or confirmation, type the password or provide confirmation.

 To check for new definitions manually

If you don't use scheduled scans, or if you don't get updates automatically, you should check for new definitions at least once a week. To help protect your computer, Windows Defender will notify you if your definitions are out of date for more than seven days.
1. Click to open Windows Defender.
2. Click the arrow next to the Help button , and then click Check for updates.
   
   

   Getting started with Windows Media Player

   Windows Media Player provides an intuitive, easy-to-use interface to play digital media files, organize your digital media collection, burn CDs of your favorite music, rip music from CDs, sync digital media files to a portable device, and shop for digital media content from online stores.

   Start Windows Media Player

   To start Windows Media Player, click the Start button , click All Programs, and then click Windows Media Player.

   Two ways to enjoy your media: the Player Library and Now Playing mode

   Windows Media Player allows you to toggle between two modes: the Player Library, which gives you comprehensive control over the Player's many features; and Now Playing mode, which gives you a simplified view of your media ideal for playback.

   From the Player Library, you can go to Now Playing mode by clicking the Switch to Now Playing button in the lower-right corner of the Player. To return to the Player Library, click the Switch to Library button in the upper-right corner of the Player.

   

                                                               Player Library
    
   In the Player Library, you can access and organize your digital media collection. Within the navigation pane, you can choose a category, such as Music, Pictures, or Videos, to view in the details pane. For example, to see all of your music organized by genre, double-click Music, and then click Genre. Then, drag items from the details pane to the list pane to create playlists, burn CDs or DVDs, or sync to devices, such as portable music players.