Whats the name of the thing that the cd holds

It is metric threading, most likely M5, possibly M4 (5/4 mm diameter of bolt). You can find bolts to fit in most all hardware or big box stores. The part "where the frame hold the rear tire" is called the rear dropout. Here's a pic showing various bike part names:The Parts Of Bicycle Nomenclature Bike Component Names What Things Are... For more bike terminology just google bicycle parts diagram

I’m happy to help further over the phone at https://www.6ya.com/expert/donald_f2ed37026a3ac881

What operating system OS? XP><? WHAT OS?
what is full model number or this 15- "????
the HP suport page shows 63 different model 15s , hark.
ok, did you try a store bought CD firs. CD-CA?
not copies or burned CD-r.
CD's come in 2 size, normal 800MB sizes and 200MB tiny.

many CD players not do the tiny ones, lacking spot there to hold it in place. (do find a pC that can copy this tiny CD to USB stick)

first try a real CD, say an install disk full size, CD (not dvd)
or a store bought CD-DA,compact disk digital Audio, say with
songs from say, Johnny Cash. (#1) then click the disk. in explorer.

the PC to AUTOplay a disks takes 3 things
1: autoplay turned on,
2: CD drive must work and be GOOD.
3: and real CD in the tray , closed. (real means with valid content)

#3 is easy no, use a real CD to test the CD, from store in the music department. (reading CD-r can fail on many older CD drives)
tests , many; , ill do some. now. (for sure a year 2000 PC)
then if say its a program disk, say you put in the HP install disk.
called the media kit, disk from HP, or from microsoft. (a real CD)
real means not CD-R , (recordables)
go to explorer, in windows 10 its now called, "THIS PC"
does the the CD show up in this true name Explorer.?
does the CD drive show up in Disk manager, in CP?>control panel..
does the CD drive show up in device manager>?
all those are a YES,
if all shows up, then look for program files on the disk using explorer.
do you see files, thre, (install disks)
one FILE might be setup.exe, can you run that.? double click it?

if yes, then autoplay is turned off in your unstated OS.
if not the CD drive is bad or the CD is not any good.

I have My Autoplay off since it was invented so viruses on said disks
can not autolaunch, a not so good thing.-

now 1 example (not XP,vista , w7,w8,w8.1 )
in windows 10, to turn on this autorun ( horror)
click settings in the run menu. w10
click devices
click autoplay on left side.
behold. turn it on or off, and blow the on button, pick a rule.
or turn it on and pick "ask me every time.".. for safety.
under removable drive.

tell OS , tell what PC this is, 15 does not answer that question
please. for 10x better help.
PS; click HP15 here and see all 63 models.

https://support.hp.com/us-en/products/laptops/hp-notebooks/

I think that it's time to take the computer to a qualified technician, before you do any more damage.

try and get hold of a cd caled herin boot up with the cd it will alow you to look att the systems paswords

Hold SEL
use right/left buttons to select DEMO
turn dial to select DEMO OFF

owner's manual here:
http://resources.jvc.com/Resources/00/00/91/GET0467-001A.pdf

u'll have to make a new CD....such a thing is not possible

make sure you have a cd and your tray spins when opened

Its called the headlamp retaining ring. Many auto parts stores can order replacement rings

After hours of messing with the dumb thing. the mini disc kept jumping around in my cd rom so placed a very small piece of tape on it (highly not recomended) to help hold it in place while the cd rom read the disk. then i copied the disk into a file and clicked on the install app mp3 player utilities 4.18 and it began to install. then after looking it over. i shut down my computer. while it was shut down i plugged in the mp3 player and started up my computer. after i ;ogged on, windows asked if i wanted to search and install the driver i clicked install. when it couldn't find the driver in updates it asked if i had a diskor do i want to browse my computer. i clicked on browse searched for the mp3 player utilities 4.18 highlted it and clicked ok and it began to install and stopped half way through. and said there was an error and a part was missing. although i noticed a new drive with an asian name and there it was. i right clicked then clicked properties and gave it a new name. it worked! what a stupid process. i don't know for sure but i think it would work with any older version of windows just not vista.
thanks dennis

To restore your notebook to how it was when you first got it.
The HP came with a restore CD or CD's. Put that CD in your cdrom drive. Re-start the notebook. The HP should boot to the HP CD. Read the following display screens closely. You will have a few different options. Pick what you want & follow the screen prompts.
Keep in mind you will most likely loose all your personal data by doing a complete restore.
You should back up a few folders to a CD or DVD.
The following folders hold most of your important data.
My Documents, Desktop & Favorites.
To keep your outlook express data. Click the + sign next to your name. Open Local Settings & copy Identities. To keep your outlook express address book. Copy the folder named Address Book.
That's it.
Good luck.
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