I'm trying to install windows 8 64-bit on my notebook using a genuine windows DVD but right after I select language and click on "install" it says the key is invalid even if it didn't asked me to type any key. But the 32-bit version DVD is working fine (I needed to install it to be able to use the notebook but it's 64-bit processor so I want to install 64-bit version). I also tried get a iso copy from a friend to install from USB device but I got exactly same error. How do I fix it?
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