My Windows says it is not genuine

Well this is my problem..

Apparently my windows is not Genuine. 

The only thing is I have had my computer for two years, Its a Acer Aspire and Windows was preloaded on to it.

I have had it for two years but this is the first time this popped up.

Any help?

Thanks!

You shouldn't complain really, it's the first time your Windows has not lied to you...

please refrain from spouting faggotry when speaking on matters you know nothing about, thank you

Odd, does your laptop have the coa sticker on it? If so try re-entering the code to see if the problem goes away.

Softwhere keys go bad from time to time you should be phoneing microsoft right now geting them to fix your key.....