My friend got a trojan virus on his computer and it knocked out the sound how can he restore it he t

Try to reinstall the driver.

My friend got a trojan virus on his computer and it knocked out the sound how can he restore it he tried ?antivirus downloads

first, remove the trojan.

then reinstall the sound card driver.

you may have to go to control panel%26gt;sound/audio devices and specify the sound card as the output/playback device.

My friend got a trojan virus on his computer and it knocked out the sound how can he restore it he tried ?cafe racer

download any anti trojan software !

i recomended SpyWare Doctor !

http://www.pctools.com/spyware-doctor/
Greetings!

He must first identify the virus. (program) He may google or check the Norton site. He may use software to isolate and remove it.

If he identifies it, the best way is to do it in the safe mode, so it can't reload at the next boot.

Most virus's attach themselves to a boot.ini file to assure that will happen

Good Luck
Get rid of the virus using anti-virus software then re-install the sound cards driver....
Try these. They work and they are free:

Run the tool and then download the free spyware and virus protection programs:

Malicious virus removal tool:

http://www.microsoft.com/security/malwar...