Well, it's probably a hardware compatibility issue. Technically your laptop came with W7 and is now 8 years old. A quick check of Dell's support website shows that W10 is not supported for your laptop on their website.
This usually means you will experience one or more hardware incompatibility issues with your laptop. Microsoft guarantees that W10 will run on ANY
computer that came from the factory with W7/W8x pre-loaded. However, there are always exceptions here.
My guess, Microsoft never put in drivers into the latest W10 Creators Update (April 2017) that works with your Intel Graphics chip; even though it worked with W10 AU (Anniversary Update; July 2016). You could try and call Microsoft and have their support look at your issue and see if they can help. Be aware, that since Dell has no W10 driver support on their site, it's up to Microsoft to see if they can make it work for you. You will be on hold for hours, and they will charge you $39 to $99 US
unless you bought a maintenance contract 8 years ago when you purchased that laptop which most home users rarely do. Just want you to be prepared. That laptop only has 2 years of life left on it from a hardware perspective, so you might just run v1607 on it for 2 years, and replace it with something else at that point.
My recommendation anyway.