Solved System tries automatic repair, fails and restarts

My laptop is a Dell XPS 15 Touch. The only spec I think is relevant to this problem is it's storage: a 1 TB hard drive with a 32 MB solid state acceleration cache.
Right now, it seems to be stuck in an endless loop of trying to boot itself, but not the loop I've seen others trying to fix. What happens is, when I turn it on, it says "Preparing automatic repair", and after a couple seconds the loading circle thing freezes - always at the same point. The computer then goes to the screen that says "Your PC ran into a problem and needs to restart. We're just collecting some error info, and then we'll restart for you."
However, just after it says (0% Complete) after the aforementioned statement, the computer restarts and goes back to the Dell logo and "Preparing Automatic Repair" message.
I think this problem will make a lot more sense with context, so the following explains in detail the issues I was having prior to this:
I've had a series of data corruption problems recently, the first being a few weeks ago. However, I performed a system refresh and reinstalled my stuff, and everything has been working fine since, up until this morning. When I booted it up, it came up with an error message and loaded me into a temporary profile. I followed the steps in a thread on this site regarding the issue, and everything seemed to be fine at first. However, I then realized I could not open either pc settings or the windows store. I thought I had done something wrong with the previous fix, so I created a system restore point and then tried going through the steps again.
However, I noticed an irregularity at this point. Instead of having my user file be C:\Users\(username), it was C:\Users\(username).SAM-LAPTOP (SAM-LAPTOP is what my computer's name is). the (username).SAM-LAPTOP folder worked fine, but the folder simply entitled (username) still existed, with nothing in it but the hidden folder AppData, which contained only a bunch of .dat files that the system wouldn't let me delete, try as I might.
I let it be, for two reasons: there wasn't anything I could do about it, and the system was using (username).SAM-LAPTOP anyway. I again followed the steps in the thread, this time deleting (username).SAM-LAPTOP and its corresponding registry key. However, this time, the system did not re-create a fresh user; when I logged into my regular sign on, it booted into a start screen with literally nothing on it but the background, and my user icon.
I signed back in as an administrator and tried to use my system restore point, but it failed. The computer recommended I use the "chkdsk /r" command in command prompt, which I did. Command Prompt said that it could not check the drive as it was being used by another program, and asked if I wanted to have the disk checked the next time the computer was restarted. I selected yes, and rebooted.
The scan and repair of my disk proceeded normally, albeit slowly, until it hit 11%, when it stopped progressing. I could not tell if the system had frozen or if 11% was just taking a while, so I waited for about half an hour. Still nothing had changed, so I assumed it had frozen and restarted again. The same thing happened, with the progress stopping dead at 11%
I rebooted once more, and hit the f12 key. In the menu that came up, I selected diagnostics and let it run. It found no issues. The system rebooted itself, and the endless loop began. The time was around 7:45 PM. I left and read a book for about an hour, then came back and found the system still looping, in exactly the same way. I then started typing this post. It is now 9:07, and nothing has gotten any better.
We (my family and I) are planning on sending it in to Dell to have it factory reset or physically repaired, whichever needs to happen. What I'm wondering is, is there anything we can do at this point, other than sending it in? It's still under warranty, as it's less than a year old, if that will affect answers at all.
I was able to back up important files, and I clearly still have a computer to view them on, so it isn't as urgent as it might sound, but any help or advice on how to avoid this in the future (for example, pointing out what I might have done wrong) would be greatly appreciated.

Great thing to do is backup, seems like you where prepared. Sounds like a hard drive issue. Check disk can take a very long time if there are problems. You could try that again, but sounds to me like a failing drive.

How long have you had this Tablet? I would contact Dell and see if you can send it as a RMA to have them check to see what is going on. If they are not going to fix it, ask for a full refund and get something else. The Windows tablets have had more failures than any other device. With a non SSD hd, that particular tablet uses what is called a Hybrid drive. It really sounds like it got dropped and the hard drive read/write heads either broke off of the arms, or smacked the discs really hard, and put a crack in one. The disks are so fragile on 2.5" drives. All it takes is a hammer to disintegrate them.

Personally for $2,000.00, that is an overly priced tablet if I may say so. At that price you could have just bought an MacBook Retina or Macbook air.

With an 1TB hdd it could take a couple of hours to complete.

I switched my SATA configuration to AHCI instead of Intel Rapid Storage, I and was able to get it to boot into repair options. I also called Dell, and they said they'd send a disk with a new OS on it to reinstall, so the corrupted data is wiped. Once I get the disk, I'll reinstall the OS and everything will work fine. All my important stuff is automatically backed up online, and I manually backed up on a flash drive before trying to fix the issue. I'm going to try system restore once more, and I'll update this thread when I've tried that.

Try EaseUS Todo Workstation. It does a Sector by Sector Backup. The 32 gb section is just a RAM disc.

got the os reinstall done, and it's working fine now. I think I'll keep the array in AHCI though.