Plse help me for installing audio driver for xp operating system of compaq presario cq40-301tu model

1. Right click on Mycomputer, select properties
2. Select hardware
3. Select Device manager
4. double click on the sound,volume and controller
5. if any yellow color pointed is displayed on any option then right click on the option and uninstall it
6. then select Action from the menu bar on the top and select scan for hardware changes

**** after doing this.. you can check the follwoing steps for trouble free ******

7. double click system device
8. if any yellow color pointed is displayed on any option then right click on the option and uninstall it
9. then select Action from the menu bar on the top and select scan for hardware changes
10. then it will start scanning your new hardware and ask for the installation drivers.