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I had the same issue after a Windows update with my laptop even though the hardware said it was functioning just fine.
All I did to fix the issue was reinstall the driver.
I think what happens is that sometimes Windows Update will install the wrong drivers for your hardware.
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My System: Toshiba Satellite A200-28P
Processor(s): Intel Core 2 Duo T8100 |
Motherboard: Mobile Intel PM965 Express Chipset |
RAM Memory: 1024 + 2048MB DDR2 667 |
Graphics Card(s): ATI HD 2600 XT |
Sound Card: Toshiba Bass Enhanced Sound System |
Hard Drive(s): 200GB 5400RPM |
Optical Drive(s): DVD Super Multi |
Case / PSU: Satellite A200 Series |
Cooling: Stock |
Network / Internet: Intel 4965AGN |
Monitor(s): 15.4" 1,280x800 Toshiba TruBrite |
Operating System(s): Windows Vista SP1 / Fedora i386 |
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