Laptop won't start, error 0xc000021a, infinite loop.

[CyberBeaR]

I've bought my wife a refurbished HP Pavilion x360, should have 1 month now. It's installed with Windows 10.

Recently she told me it stopped booting, I thought it'd be something simple but it turns out it's something more complex than I thought.

When I turn the laptop on, the applet will take quite a while and then it finally takes me to this screen:

http://imgur.com/MfgikSd

I then tried the Advanced Boot Options (System Restore, Start-Up Repair, etc..) to no avail. I looked at Boot Options and the HD was nowhere to be found, as it wasn't recognized, Windows Boot Manager was basically the only option to choose. I then tried to use a Rescue Live CD that I have in my flash drive but something went wrong while loading the files, as the drive letter became X:.

So I figured it should be something to do the Hard Drive, and then I went to Advanced Boot Options -> Command Prompt and tried chkdsk /R. I had first to change the drive do C: as it started on X:. It took quite long but it gave me the following errors:

http://imgur.com/AHOkpsQ

Following that it still didn't boot and I decided to turn towards the community for help!

In my Boot Settings I disabled Driver Signature. When searching for this error online the most thorough answer I found was from SpiritX MS MVP here: http://answers.microsoft.com/en-us/windows/forum/windows_8-update/windows-8-pro-bsod-0xc000021a-error/121a0f79-63f0-477e-8f1a-1d71acc9706c

Has anyone had a similar issue or can advise me how to fix this?

 

[rgd1101]

It said it can't fix it because it ran out of disk space.
Replace the HDD

 

[CyberBeaR]

It said it can't fix it because it ran out of disk space.
Replace the HDD

rgd1101, but the HDD is almost empty, it has around 400GB of free disk space.

Edit: Furthermore, the laptop is almost new! Although I couldn't run a diagnosis of the HDD, is it really safe to say that there is no alternative other than replacing the HDD, is there no salvaging??

 

[rgd1101]

It might have a lot of free disk space, but they are bad.
"A disk read error occurredc0000185"

 

[CyberBeaR]

Initially I had collected some sources of information to base on the issue, but I eventually lost the tabs and can't recall the sites anymore.

Either way, rgd1101 gave the answer, as I swapped the HDD, formatted it and since then I didn't run into this issue again. Thank you for your response, it's sad that I wasn't able to salvage the HDD.