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How to Resolve SP3 and Realtek High Definition Audio Driver Conflict Problem

When your computer has a conflict between SP3 and Realtek HD audio driver, right-click My Computer, select Properties, click Hardware tab and click Device Manager, double-click to extent Sound, video and game controllers, you will see there is a black exclamation mark in a yellow circle beside Realtek High Definition Audio. Try to reinstall drivers several times, but fail.

This problem only would possibly happen to Realtek High Definition audio users, and Realtek ac97 audio users would never come across such an issue. You can troubleshoot this conflict by modifying SP3 to SP2, specific instructions as follows: Step 1 Click Start and then select run. Step 2 Type "regedit" to open Registry Editor, under HKEY_LOCAL_MACHINE SYSTEM CurrentControlSet Control Windows, find out the DWORD value CSDVerision. If the hex value is 100, the algorism value is 256, this system version is Service Pack 1 (SP1); if hex value is 200, algorism value is 512, this system version is Service Pack 2 (SP2); if hex value is 300, algorism value is 768, this system version is Service Pack 3 (SP3). Step 3 Now you need to change the hex value to 200 and restart your computer, thereby the system version would roll to SP2. Step 4 To check this changed system information, you can right-click My Computer and select Properties. Step 5 Click Start and select Control Panel, double-click Add or remove programs and Windows components in the Classic View, unload kb888111xpsp2, find and install a compatible Realtek audio driver. It will take over 5 minutes to unload kb888111xpsp2 and delete or stop related service and setup, please wait patiently. Finally the conflict between SP3 and your Realtek HD audio driver disappears.