I have just re-imaged a Gateway 450 ROG for a friend of mine on the website the audio driver is found (http://support.gateway.com/support/drivers/search.asp?st=pn¶m=3501353
) under the heading Sound Downloads. This unzips a list of files C:\cabs\9520522
stac97(control panel extension)
stac97 (setup information)
1. From the Start menu, click Control Panel.
2. In Control Panel, click Performance and Maintenance.
3. In Performance and Maintenance, click the System icon.
4. In the System Properties dialog box, click the Hardware tab, and then click Device Manager.
5. In Device Manager, click the plus sign (+) next to Other Devices, and then double-click Multimedia Audio Controller.
6. In the Multimedia Audio Controller Properties dialog box, click the Driver tab, and then click Update Driver.
7. In the Hardware Update Wizard dialog box, click Install from a list or specific location (Advanced), and then click Next.
8. In the next dialog box, click Search for the best driver in these locations, and then click Include this location in the search.
9. In the text box, type: C:\CABS\9520522. Click Next.
10. Click Finish.
Now once installed sound only comes from using the headphone jack, the external speakers get a little sound if the volume is turned up to maximum.
Hope this helps
Orvell Tucker Jr.