The Dell Recovery Disk, is exactly that, it is an image of what the machine was when it left the Dell factory; it will ONLY work on that specific disk.
Which means, that if you ghost that drive to another disk, the software will recognize that this is a different machine, and will not work. It will blow away the entirety of what was on the main partition (thereby fixing, or re-mapping the bad sectors by the reformat) any bad sectors. It will reload the image the disk had as it left he factory, so if you had a bunch of crapware (Earthlink, America Online, etc) when you first bought it, you will have it again.
Also, the free upgrade from Win7 to Win10 may or may not be currently available. I would hazard a GUESS that the base requirements for Win11 will be more than this Win7 hardware can manage.
My advice (take it or leave it, it’s your $$) is purchase an external USB SATA drive of ~1-2 TB and have Windows make a Restorable backup of your hard drive. That way, if your hard drive utterly dies on you (smoke, flames or simply refuses to spin up), you can restore your machine to the latest backup from that external drive, and not lose valuable data.
For what it’s worth, Sold State Hard Drives (SSD) are approximately 20+x faster than the old spinning drives, and far more reliable. Prices have dropped significantly.
There are others on this board more knowledgeable than I. Depending upon your level of skill, I would encourage considering some flavor of UNIX, the performance bump and similarities to Windows is remarkable.
Why no one mentions “Image back up”?