Lost Sound since autotune

Hello Amanda,
We are sorry to hear that you have lost your PC's sound after running scan with AVG PC tune up. It is very unlikely that AVG PC tune up will interfere with sound drivers. AVG PC tune up scan, clears only browser cache, broken shortcuts and junk files. However, we would suggest you to revert the changes made by AVG PC tune up using the steps provided in this article http://support.avg.com/SupportArticleView?urlname=How-to-revert-changes-done-by-PC-TuneUp and check if the issue persists.
Thank you.

I ran AVG PC Autotune today, and since then I have lost sound, I have updated all drivers, I have even done a system restore and still no sound. I am getting an error saying it can not find the hardware related to my sound. my soundcard is a SoundBlaster X-Fi Extreme Gamer. It was working perfectly fine until I ran this

Hello Amanda,
We are sorry to hear that you have lost your PC's sound after running scan with AVG PC tune up. It is very unlikely that AVG PC tune up will interfere with sound drivers. AVG PC tune up scan, clears only browser cache, broken shortcuts and junk files. However, we would suggest you to revert the changes made by AVG PC tune up using the steps provided in this article http://support.avg.com/SupportArticleView?urlname=How-to-revert-changes-done-by-PC-TuneUp and check if the issue persists.
Thank you.

Hello Amanda,
Since you have already restored the file. In this case, we suggest you to check in your device manager if the sound hardware shows as active. If it shows as disabled or not installed, then you need to check this with your computer manufacturer. Please open the run dialog box and type as this command devmgmt.msc. This will open the Device Manager in your computer and from there check if sound or speaker hardware working fine in your computer. Please make sure that speakers are not set to mute in your computer.
Thank you