Dell recommends the customer review specifics about the update to determine if it applies to your system. The update contains changes that impact only certain configurations, or provides new features that may/may not apply to your environment.
This driver works for the following laptops:
New Installer + Stereo Mix + Microphone
Microsoft Windows 2000
Microsoft Windows XP
Microsoft Windows XP x64
Here's other similar drivers that are different versions or releases for different operating systems: