OK, here's the next step
First go here
http://drivers.softpedia.com/get/SOUND-CARD/RE ALTEK/Realtek-HD-Audio-Codec-Driver-R163.shtml
Part way down the page you will see
"Realtek HD Audio Codec Driver R1.63 driver description"
which has a little green arrow "Download" symbol beside it.
You need to click on this link.
A new page will launch (so long as you dont have any pop up blockers!) and you should/might then get the Internet Explorer Security warning bar at the top of the page.
PC makes a bleep noise when this appears.
Right Click on this bar and select "Download File".
The file is about 16 Megabytes and is a .exe file.
Save this downloaded file to your PC
(Somewhere you can find it!! )
Once downloaded, go to the file, and double click on it to install it.
Your PC will likely need to be rebooted after it installs.
This should bring your Sound Codecs up to latest specs.