Recently i had purchased a new SONY VAIO laptop. On which Windows Vista was preinstalled. Just few days back i had downgraded to Windows Xp and even had installed all necessary drivers for Windows Xp. But now the problem is that i'm unable to control the brightness. My Fn + F5 along with F6 keys doesn't work on my Windows Xp. Can any body tell me that why does i'm having brightness controller problem on my SONY VAIO laptop? Any body have any idea about it? Please provide me the correct solution to get rid of the above issue. Would be grateful if any body helps me out.
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