This is a hard drive failure error.  Your hard drive has died and needs to be replaced, this is most likely what has been giving you problems with your Inspiron.  If your computer is still under warranty, you should call Dell and have them issue you a new drive.  If not you'll have to purchase one and install it or pay someone to do this for you if you aren't comfortable doing that.  Any standard laptop hard drive should work fine and you can most likely find instructions or videos online for how to change the drive.

The HDD has failed. Boot using a Linux Live Bootable USB as soon as possible and attempt data recovery to an external HDD. Then replace the HDD with a SSD such as a Crucial MX300 and clean install Windows 10:

http://dellwindowsreinstallationguide.com/data-recovery-using-fedora/ 

I agree with the above answers; you need to replace your hard drive. I suppose you have all your backup saved else you will have to pay. I was into similar situation when this error came and I realized that I haven’t took backup of my hard drive. My pc was out of warranty so my friend recommended me Stellar hard drive recovery services. Each and every bit of my information stored in hard drive was retrieved.  Though I had paid for services but seeing end result I was satisfied.   I hope it works for you as well.