Looking for help sound is getting scrachy, ahahahahahahahahahahahahah

I had you guys (Majorgeeks) look this over a few weeks ago and am seeking help my sound is starting to go in and out scrachy buzzy, I looked in the Bios and made sure that the sound is off, like I was told, by Musksnipe, I checked my Hardware Manager and I do not have any question marks next to my sound even when I expand it to view all that is in the sound manager. If I can I would like Musksnipe to help out he knows my system. I did just install 4GB, 2 days ago and thought I bumped the card I did check that and no it did not move. I shut my cp down and pulled the plug for 20 seconds then rebooted but I still have the scrachy sound. I checked my I tunes and it still has no sound but scrachy and poping noise.:confused
Last time I was on here the title was:

'I have no sound aany more what can I do'

and Musksnipe did help out alot and I would like to work with him if I can thanks.

 

I have checked my speakers and now my system is not bad, its a Klipsch THX 5 speaker system more then 250 wts, I have never had it past 1/2 way, the sound is very very good, I have pluged into a nother source and it works, I did try puching the sound card just to see if it moved when I was placing the mem in place and I have my sound back. So Halo thanks for looking into this for me, youu guys are too cool I am sure glad this site is here.:wave