It could be from the Dell Update previously. It did an update, but I don't know what it was. Then Microsoft has downloaded umpteen updates. So I am not sure. I have done no graphics driver update on my own, with this computer. On my older computer, yes I had to after the horrific upgrade to 8.1. (from Win8)
I got this computer in early January. So it is possible it was updated before they sent it out. I have had other things going on, and have not compared what I have to what Dell is showing for drivers that I could update the driver with. I did try to update a card reader driver, but Win10 would not allow that. It said what I had was better. (paraphrase) I feel sure that was from Win Updates. It is a great idea to let Win Updates show me what drivers I could update to. Then I can check it out, and see if I want it. It is a very bad idea to automatically install one. It may be glitchy. If you were in the middle with something, the last thing you need is to drop that, and have to work on computer "issues".
I have seen drivers pop on & off & back on my own Dell Drivers & Downloads site. But I'm inclined to believe your Intel HD Graphics 4400 driver, v.20.19.15.4331, never was at your site. I think the site hasn't caught up to that particular advancement put into the latest Dell Inspiron 3847 Desktop which you've got. I think that driver came with your machine, as you suspect. The 4400 is mentioned in...
http://www.mysoft.hu/docs/Dell/Dell\_Inspiron\_3847.pdf
Dell Inspiron 3847 Specs
It is possible that Dell updates to that driver are meant to come in through Windows Update. Such an agreement between Dell & Microsoft is intimated in an article I posted earlier...
http://www.dell.com/support/article/us/en/19/SLN297955
Windows 10 upgrade walkthrough
==== Quote ====
Update your computer with Windows 10 drivers after the upgrade
Once your computer has finished the upgrade to Windows 10, check the Dell drivers website for updated drivers for Windows 10 that may not have made it into Windows Update. [Emphasis added.] Install all drivers under Windows 10 that are appropriate for your computer.
==== EOQ =====
I think that possibility is what you turned off with PA Bear's input. Which could be wise (though I haven't done it) - considering that other Dell article, which said: "Installing drivers unnecessarily can, in some rare cases, create new problems" and considering various horrid threads I seen here/there about auto updates. Nevertheless, it's up to you, now, to occasionally check Dell's Drivers & Downloads site for driver updates that may be critical (& hopefully harmless). I would contact Dell & ask them why the site doesn't seem to have caught up to your particular machine. They shouldn't want money yet.
Yes, when you get the time, make a comparison of all your drivers against the Dell site. Right, as with your card reader, driver downloads from the site do a version check before installing. Very good. One of them once told me to manually uninstall the greater version first, if I wanted the lesser. Then, turning off auto-driver updates would be necessary to prevent the greater version getting back in. Let's hope it never comes to that!
If you've installed something at Dell's Drivers & Downloads site & forgotten what it was, there's a chance a record of it was made in a restore point. Here is the restore point that Windows made automatically after I had the site install 4 driver updates...
Have you ever inspected your restore points?