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do following steps:
Disable Hardware Acceleration
(1) Click Start, point to Setting, and click Control Panel.
(2) Double-click System, and click the Performance tab.
(3) Click the Graphics button, and pull the bar from Full to None for Hardware Acceleration.
(4) Click OK, click Close, and click Yes to restart your computer.
Disable the Sound Acceleration
(1) Click Start, click Run, type DXDIAG, and click OK.
(2) Click the Sound tab, and pull the bar from Full to None for Hardware Acceleration.
(3) Click Exit to exit the DirectX Diagnostic Tool.
(4) Restart the computerb
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