Thank you for joining HP Forums.
I'll be glad to help you
As I understand you want to check your warranty status with HP,
Don't worry as I'll be glad to help, however, to provide an accurate resolution, I need a few more details:
Do you get any error message while using the "www.support.hp.com/checkwarranty" website?
While you respond to that, I recommend you make use of the private message feature within HP Forums and reply back with the product & Serial number,
And I'll look that up for you ![Smiley Wink Smiley Wink]()
(Please ensure you "do not" share any personal or confidential information such as serial/phone number, shipping address, email ID, etc... on a public post)
Keep me posted,
If the information I've provided was helpful,
give us some reinforcement by clicking the solution and kudos buttons,
that'll help us and others see that we've got the answers!
Good Luck.