We can't answer your question -- because you're giving us NO useful information to work with!
We need to know the version of the OS that you're trying to activate (i.e, Win7, Win8x, Win10.
We need to know if that version came preinstalled on the PC or if you installed it yourself.
We need to know if the version you're trying to activate is different from the version that came preinstalled.
We need to know WHERE you got the media you have used to install Windows, for example, is it a DVD you got from a download, or a product you got from Microsoft, or a set of Recovery Media you got from HP?
We can proceed once you provide the information.
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