How to Repair Code 28 for Windows XPby Lucosi Fuller ; Updated September 15, 2017
Microsoft Help and Support says that "Code 28 (The drivers for this device are not installed)" appears when the Windows Sound System Compatible Driver for the Windows 2000 operating system is deleted upon the upgrade to Windows XP. This article will explain how to repair this code.
Repairing Code 28 in Windows XP
Click on "Start."
On the "Start" menu, click on "Control Panel."
In the "Control Panel" folder, click on "Performance and Maintenance."
Click on the "System" folder in the "Performance and Maintenance" folder.
Click on the tab titled "Hardware."
Click on the box that says "Device Manager."
Click on "Sound, Video, and Game Controllers."
Right-click on the device that prompts Windows XP to display Code 28 (it should be Windows Sound System Compatible Driver, also called the WDM driver). A drop-down menu will appear.
Click on "Update" and an Update Wizard will guide you through the installation of a new device driver, which should stop Code 28 from appearing on Windows XP.