Audio drivers for Windows XP and Vista Sony VAIO VGN-Z790 Notebooks:-
1. Realtek High Definition Audio Driver 220.127.116.1124 for Windows Xp. This utility installs the Realtek High Definition Audio driver for Microsoft® Windows® XP operating system.This driver also resolves the yellow exclamation point error that may appear in Device Manager as "PCI Device" which indicates that a driver is not installed for that device.During the installation of this file, be sure that you are logged in as the Administrator or as a user with Administrative rights.
2. Realtek HD Audio Driver 18.104.22.16830 for Windows Vista. This utility installs the originally shipped version of the Realtek High Definition Audio driver. During the installation of this file, be sure that you are logged in as the Administrator or as a user with Administrative rights. To ensure that no other program interferes with the installation, save all work and close all other programs. The Taskbar should be clear of applications before proceeding.