I couldn't get the sound driver

if your computer came with a motherboard disc the sound drivers could be on it
click start control panel administrive tools computer management device manager scroll to sound video and game controllers you might see a yellow question exclamation mark? ! or a red X Right click to reinstall drivers if you don't have a disk with the sound drivers you have to download them
http://download.cnet.com/g02-cd33-a3-rar/3000-2098_4-200366.html

ATI MOBILITY RADEON XPRESS 200

ATI Function Driver for High Definition Audio - ATI 793C

ATI Function Driver for High Definition Audio - ATI 791A

ATI Function Driver for High Definition Audio - ATI AA01

ATI Function Driver for High Definition Audio - ATI AA11

ATI Function Driver for High Definition Audio - ATI AA09

ATI Function Driver for High Definition Audio - ATI AA19

this driver package is 480 mb

http://download.cnet.com/g02-cd35-a1-rar/3000-2098_4-200883.html
this one is much the same
if these arent right you will find free sound drivers
http://download.cnet.com/2000-20_4.html
on the home page you should see a search tab just type in what you are looking for
(be precise)but don't use numbers or / - also the download software finder under that there will be a list place a tick in the box of any one you want/need
hope it helps

Call of Duty 2 Minimum System Requirements
3D hardware accelerator card required - 100% DirectX 9.0c compatible 64MB hardware accelerator video card and the latest drivers*
English version of Microsoft Windows 2000/XP
Pentium IV 1.4GHz or AMD Athlon XP 1700+ processor or higher
256MB RAM (512MB RAM recommended)
100% DirectX 9.0c compatible 16-bit sound card and latest drivers
100% Windows 2000/XP compatible mouse, keyboard and latest drivers
4.0GB of uncompressed free hard disk space (plus 600MB for Windows 2000/XP swap file)
8x speed CD-ROM or 2x DVD-ROM drive

Multi-player Requirements
Internet (TCP/IP) and LAN (TCP/IP) play supported
Internet play requires broadband connection and latest drivers
LAN play requires network interface card and latest drivers

Supported Chipsets
ATI Radeon 8500
ATI Radeon 9000
ATI Radeon 9200
ATI Radeon 9500
ATI Radeon 9600
ATI Radeon 9700
ATI Radeon 9800
ATI Radeon X300
ATI Radeon X550
ATI Radeon X600
ATI Radeon X700
ATI Radeon X800
ATI Radeon X850
nVidia GeForce 2 Ultra
All nVidia GeForce 3/Ti Series
All nVidia GeForce 4/Ti Series
All nVidia GeForce FX Series
All nVidia GeForce 6 Series
**Recommend nVidia GeForce 7 Series or higher

Do your PC support the above hardware requirements?
The most common input no support would be your graphic card is not up to the mark to play the PC games.

Is your graphics card drivers up to date to the latest?
Have you updated your DirectX to the latest version?

Hope it helps.

This is all about ATI HD sound drivers

http://www.tomshardware.com/forum/257845-33-radeon-4850-function-driver-audio-aa01

Try this one here:
http://rapidshare.com/#!download'734l35'73412807'EXT5410_Realtek_Audio_v5.10.0.5273.zip'25422

Good luck!

use this link to go to ati's site you should be able to get them there
http://xpdrivers.com/ati/_2_135301.cfm?gclid=CLTiieq83qMCFQdGagodVyyW4Q

try the NGO modded drivers for creative sound blaster or audigy cards from: . http://www.ngohq.com/home.php?page=Files&go=cat&dwn_cat_id=20&go=giveme&dwn_id=20 . click agree and file will download....

ATI D33053 Radeon R9600 256M Video Card

http://drivers.softpedia.com/progDownload/Toshiba-Satellite-A215-S7472-ATI-Display-Driver-8-371-Download-41846.html
driver downl;oad form here.

Hi, sounds like your display/video card drivers are not installed... If you have an ATI video card you can just google ati display drivers... If you are using a NVIDIA video card then google Nvidia display drivers... make sure when you visit these websites you download the drivers for you country.... UK & US there is a difference...

Check your control panel. Go into sound and see if it is disabled. If you have your sound card drivers handy you might want to reinstall them.