Why is it that when I play music files and any media, there is no sounds that is coming out on my speaker?

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Sound Device Problems
"Windows Media Player may be having a problem with your sound device (either your sound card or your sound controller) "
Make sure that a sound device is installed on your computer; if one isn't, just install one
In most cases, Windows will automatically detect the new hardware and install the necessary software drivers
If Windows does not automatically install the software drivers, run the Add Hardware Wizard to install them yourself (in Control Panel, open Add Hardware)
Another program may be using the sound device, preventing the Player from accessing it
Close all other programs so that the Player is the only program running, and then try to play the file again
The software drivers for your sound device may be missing or corrupted
Try reinstalling the most recent software drivers for your sound device by scanning for updates on the Windows Update Web Site or by going to your sound device manufacturer's Web site
The Player may be using a version of Microsoft DirectX that is incompatible with the hardware features on your sound device
This may explain why you can hear sound when you use some software programs, but not when you use the Player
Install the most current version of DirectX by going to the DirectX Web Page.
If the problem occurs when you are trying to play CDs or DVDs, get the latest driver updates available for your computer's CD or DVD drive by scanning for updates on the Windows Update Web Site or by visiting the hardware manufacturer's Web site
If none of the previous suggestions work, refer to your sound device manufacturer's documentation or run the Sound Device Troubleshooter to see if the device is functioning properly:
In Control Panel
Open Sounds and Audio Devices
On the Hardware tab
Double-click your sound device in the list of hardware devices
View its properties
Or click the Troubleshoot button to help you pinpoint any problems the device might be having
Note:
In some cases, this error can be caused by improperly configured speaker or sound device properties
If you determine that your sound device is functioning correctly, try changing basic properties for your speakers and sound devices by doing the following
In the Player, on the Tools menu
Click Options
On the Devices tab, in the list of devices, click Speakers Click the Properties button
On the Speakers tab, try changing the following properties
Select a different audio device for sound playback
If your problem is that you can't play audio CDs, clear the check box for the 24-bit audio option
If adjusting the basic properties doesn't solve your problem, then try configuring the advanced speaker and sound device properties
In Control Panel, open Sounds and Audio Devices
Try changing the following Sounds and Audio Devices properties
On the Volume tab
In Device volume
Clear the Mute check box
Or click the Advanced button to open Volume Control and make sure that playback volume controls are not muted and are adjusted properly
On the Volume tab
In Speaker settings
Click the Speaker Volume button and raise the playback volume level for your computer's speakers
On the Audio tab
In Sound playback
Click the Advanced button on the Speakers tab
Select a speaker setup that more closely resembles your computer's speaker setup
On the Audio tab
In Sound playback
Click the Advanced button on the Performance tab and try raising the hardware-acceleration level
Setting the level at full acceleration supports all drivers, and is recommended for most computers
On the Hardware tab
In the list of hardware devices
Double-click your sound device
View its properties
Or click the Troubleshoot button to help you pinpoint any problems the device might be having...Show more

You need to get the sound card drivers for that OS and your sound card.
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