Help with Dell optiplex gx520 sound device was deleted.

[Jess000]

"Windows Media Player cannot play the file because there is a problem with your sound device. There might not be a sound device installed on your computer, it might be in use by another program, or it might not be functioning properly."
I deleted it by accident and i'm not sure how to fix it. Please help=)

[Broni]

Go to Dell's site, enter service tag number, download, and install new sound driver.

[JJ 3000]

Do a System Restore to before the problem started

http://www.computerhope.com/issues/ch000589.htm