Cloning it not necessary. Since new Hard drive will not have any OS on it, this is why I was recommending clone.  you can do a fresh start, first make a bootable USB with a copy of windows 10 on it. You can run media creation tool  and make an 8GB flash drive bootable. Once flash drive is ready install your new hard drive in your machine and boot from this USB from F12 menu to begin windows installation. 
So I have this old XPS 8700 and the hard disk is dying I need a new one, Problems are: Dell don't have them. I don't have any software. My computer is having issues like I can't get Windows Explorer to open, I can't get the Uninstall thing to work. I got Avast in my computer and I can't uninstall it. I need to download updates but that doesn't seem to want to work either. I deleted some stuff I probably shouldn't have. I need to back up some stuff. How do I get a new hard disk with all the software already on it to make the computer like it was when I first bought it?
XPS 8700, need a hard disk with Dell image?