No sound on system

Hi,

I lost all sound on my system. I had my laptop cleaned up from all malware, please refer to link http://www.bleepingcomputer.com/forums/t/274210/have-trojan-downloader-and-other-malware/.
However, I still have some errors and am not able to make sound work even by reinstalling drivers...Can you please help? Thank you!

If the following does not work, please post back and let us know. Are the errors you have related to sound or other issues? If sound related, post the error(s) in your reply. Also, are you using on-board sound or a sound card? Whichever one, it would be helpful to know the device name. (example, my audio device is on-board and is RealTek AC97)

Something to check.

Start/Control Panel.

Open Sound and Audio Devices.

Volume tab, click on Advanced in Device Volume.

Play control should open.

Click on Options/Properties. Place a checkmark by everything, click OK.
Back to Options/Advanced Controls.

If under any of the categories, you see Advanced click on that, if a box opens that has
OTHER CONTROLS/1 Digital Output Only* check if it's unchecked. (if you see Advanced in the panel Volume Control, you won't need to check any other advanced settings.)
If it's unchecked, check it.

Open up a player, add a music file, do you now have sound? If you have to, plug the speakers into every port on the card and see if it works.

*it may have another number. If it does, check or uncheck it.