Here is the page with all of the official drivers for that particular computer.
Click on the Driver - Audio (1) section and download that driver.
However, those drivers listed are for the hardware and operating system that comes with a Compaq Presario SR1010NX, so if you upgraded your hardware, or changed your operating system then do not download the driver since it will not work.
If you did change some hardware, or operating system, comment back and let us know. If you run a pc audit program such as Sandra Lite http://www.filehippo.com/download_sandra_lite/
you can find out your exact motherboard or audio card which would be a great help in finding the right driver for you.
If a driver upgrade does not fix the problem, comment back and let us know.
Hope this helps!