Just installed Firefox.

I did disable smooth scrolling. Seems like the problem reduced but it still there.

How do I stop this?

I just installed windows 7 fresh.

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I just installed the graphics media accelerator drivers.

There were two files.

Intel_g31 and intel_vga.

For g31 file I got error message so I guess that did not install successfully.

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Seems the flickering has stopped.