Oh, I didn't mean to imply that I acquired this computer brand new around that 2013 time. That is when my oldest sister let me use it. She and her husband had already had it in storage for about 1½ years when they were out of the country. And they had already used it for some years before that. So, it's not exactly new.
Out of curiosity, I decided to go through the motions of checking out the warranty status in that HP Support Center site. Wooooo! It turns out it's actually older than I even thought it was. It claims on there that the warranty began on May 11, 2009 and ended on September 2, 2009 ... as a Refurbished computer. Hmmm ... I wasn't even aware my sister and her husband bought it as a refurbished computer. I could be wrong, but somehow I don't think they knowingly bought it as such. I'll have to e-mail my sister and check to see if they indeed did knowingly buy this computer as a refurbished computer.
Thanks for that link to the HP Support Center Warranty Status Checking page, Eddy. It's a good one to have. I already bookmarked it.