Hello @axell02
Thank you for posting in the HP Support forum. Welcome !
You do not have activation key the easy way on a sticker because of Microsoft decision to change the way keys are distributed (long time ago). Please, read this article > https://www.cnet.com/news/windows-8-moves-to-bios-based-product-keys/
(ignore the video/sound from the Cnet article)
You may try to use some of the offered tools here in these articles to get the key from BIOS (no guarantee this will work - unofficial tools):
>> https://www.pcsteps.com/4198-get-windows-8-1-product-key-bios/
or >> https://itsolutionsblog.net/3-ways-to-extract-the-windows-8-product-key/
With regards to your issues :
- Did you perform some major software or hardware changes recently ?
What did you do so that it asked you for activation ? These things do not happen just like that out of nowhere...
- Can you read this HP official article about Win 8 activation issues >> http://support.hp.com/us-en/document/c03486254
Can you try the phone activation and get in touch with Microsoft system >> http://support.hp.com/us-en/document/c03486254#AbT4
Looking forward to your reply.
>> Your FEEDBACK is important. Click below on Accept As Solution or ThumbUp+ buttons if my comments helped or to say thanks <<
*** I work for HP *** I express personal opinion only *** HP Expert - Volunteer since 2013