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i have a sound card of intel(r)82801 BA/BAM AC 97 AUDIO CONTROLLER 2445

IN WINDOWS XP I WAS UNABLE TO USE MIC . Recently i have installed tiny windows 7 it show no sound device is available .When i tried to upgrade the drivers it show that drivers are ok and working condition.I have scaned the system with driver generous but i does not show any update for this device . I have tried universal driver too but problem is still there please help me .Should i have to replace my sound card .I want to run this operating system on my pc
any expert please help me .I shell be very thank ful to you

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