Windows 8.1 Expired Problem

Hi,

I just bought a new laptop last month and it has windows 8.1 by default.
And today there's a pop up that said I need to activate my windows. I dont know what should I do, it said that it will expire in April 28th.
When I checked on properties the windows is Windows 8.1 Single Language and it said Windows is activated.
Edit: i browsed and found some method to know if your win is original or not and these are the results


So, what should I do?
Thanks in advance and sorry for broken english.

Take it back to wherever you bought it. Do NOT be trying fixes yourself or they may argue that you've voided the warranty.

That is a volume license key that apparently has a short shelf life. I would also suggest to take the whole thing back. Let the seller deal with it.

@md2lgyk and @whs: ok, should i take it to the seller or directly to Asus center? (since i purchased an Asus)

I would go back to the seller. If it has been modified in any way, Asus may be unable or unwilling to help you.

Ok then, I will do that. Thank you md2lgyk, whs, and deaconfrost for the replies, I really appreciate it.