Hello,
I have purchased a acer laptop(window vista home basic)extensa 4220,two months before my laptop was showing window explorer not working,i was not having the acer recovery c.d thats why i had formated the laptop with lenevo vista c.d,after two months again my laptop is not working displaying the message invalid product key for activation of windows,pl. advice me how to sort out the problem.
Configuration: Windows Vista Internet Explorer 8.0
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