How to Troubleshoot a Lagging Scroll
Graphics Processing Unit Rendering is the default mode for Internet Explorer 9. When GPU Rendering is not supported, the browser uses Software Rendering mode, which may cause scrolls to lag. Determine mode your browser is using and then verify that your computer's video driver or video card supports GPU hardware acceleration.
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Instructions
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Launch Internet Explorer 9.
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Click "Tools."
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Click "Internet Options."
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Click the "Advanced" tab.
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Confirm the rendering mode. If the box for "Use Software Rendering Instead of GPU Rendering" is checked, it means that the Internet Explorer 9 is defaulting to Software Rendering mode. If the option is shaded, hardware acceleration isn't supported by your video card or driver.
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Visit your video card manufacturer's website and update the video driver or consider upgrading your video card if you want to use GPU Rendering mode.
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