I've looked everywhere to get this fixed, nothing works.
I don't really understand drivers, graphics, intel, nvidia etc. so please be detailed or "dumb it down".
Strange thing is, I have this issue on my gaming laptop from MSI, that's made to handle almost anything, has tons of disk space, and the better specs. Yet I did not have this issue on my average Dell laptop I got from school...
I am sorry to tell you this, but that laptop of yours is now obsolete, and is now no longer supported any more by Adobe and the original hardware manufacturers. You see, both Intel and Nvidia had completely ceased all driver development for both of those GPUs a few years ago. The 4th-Gen Intel CPUs' IGP is technically still in legacy support (that is, only critical security fixes have been issued for newer driver versions for that IGP since 2017), while Nvidia had officially ceased all support outside of archived drivers for all Kepler mobile GPUs (of which the GTX 870M, which is actually based on a much older GeForce 600 series GPU, is one) in April of last year.
In other words, if neither Intel nor Nvidia will fix that problem, neither will Adobe.
So, I would not be surprised if a future version release of Premiere Pro would instead issue an "Unsupported graphics hardware" warning on launch, and then offer the user to continue with all GPU acceleration and GPU decoding and encoding disabled.