i mistakely delete sound device from my laptop.my laptop is nomore given any form of sound atll.when i insert a cd it respound this erro msg"Windows Media Player cannot play the file because there is a problem with your sound device. There may not be a sound device installed on your computer, it may be in use by another program, or it may not be functioning properly. pls i help on hw i can install it back or mend the problem.

Go get the driver on the at www.dell.com and install it back. simple!