The Start Up disks are the same thing as the Recovery disks. It's just semantics. You make these disks when you first get your computer, so you have a clean copy of your computer at factory settings when you first START UP your computer. Later, if things go wrong, you put it in to RECOVER/RESTORE your computer
back to the way it was originally at START UP, with those first factory settings.
The old, factory pre-made disks were called Recovery disks. Because that's the only time you used them. I guess,

now they are called "Start-Up Disks" as you have to make them yourself, when you first start up your computer. I guess they don't want people to get confused and think you can wait until you
need a Recovery disk, to
then think you can make one.
HP computer here too.

Never again. I went with the 3 DVD route someone else mentioned. The computer worked fine for several months. Then I installed A Google app that caused my computer to completely freeze and wouldn't do anything. Luckily, it let me reformat.
So I installed my start-up/recovery disk in. The
first one installed fine. However, once my system installed that one, the second and third one would NOT be accepted.

In fact, my DVD burner/player won't play or burn ANY DVDs or CDs. It simply doesn't work for anything else.

Oh, it WILL accept the first disk over and over and over again, to reformat, but NOTHING after that.

Apparently, whatever info, drivers, programing, etc. for the DVD player
is stored on the second & third disks.
I lived without the DVD burner all this time. (2 1/2 years now.) But last month, I was going to take a seminar in which we had to load softwared for it via a DVD installation disk. I finally called HP tech support. It was a $50 call as my warranty was up. Of course it was an "overseas" tech.
After having to explain the situation
several times 
he proceeded to tell me I need to reformat my laptop
again. Umm, NO. I'd just end up where I already was. Except, I'd be missing all the updates and other software that I installed. I
already knew several times that disks 2 & 3 won't load.
He then proceeded to try to sell me a new installation disk for $40 that might have all the info I need - except we weren't sure if it would play on my current DVD player.
He proceeded to tell me there is something wrong with the DVD player - that's it's broken.

He tried to sell me a new replacement DVD burner for about $150, to replace my non-working one. NO, it works FINE to reinstall the first disk over & over & over.
Finally after about 40 minutes of going though this,
I finally came up with the idea that I simply have to buy an
external DVD player (cheap off eBay) for whenever I need a DVD player to install something that can't be done by flash drive.
Of course the HP tech support guy was overjoyed that
WE arrived at a satisfactory conclusion, so he could end the call.
I wasted $50 on that call as it was only a "diagnostic call". He reiterated over & over that any additional services/equipment would cost me money.
For that $50 I could have bought the cheap, external DVD burner that
I came up with. OR I could have taken my PC to the local Geek Squad and spoken to an American, in person, who could have then proceeded to manually load in CDs & DVDs and my installation disks to accertain the real problem. Also, He could have had an external DVD player there or a slave unit in which he could have installed DVDs 2 &3.
This was my second HP laptop and
it will be my last. Their idiot overseas tech support is what made up my mind about that.
I ended up missing the seminar the next morning because I couldn't buy an external DVD player in time to install the software disk before the start of the seminar.
