The installer hard fails, at the get go, or after the install hard failures of PC or just some things fail. (like sound or Lan or GPU is weak)
All things must end. (have an end)
Myth: Windows 10 should run on any PC, (false)
PCs have a life span of about 10 years, but many PCs fail at 5 years old for : (bad batteries are first, then a bad HDD) We test the hdd first.
The reason window installs fail for both 32bit and 64bit are simple this answer."no support" !
The chip maker ended support and when that happened your OEM PC maker can not provide any drivers at all lacking the base line driver from the CHIP Silicon maker.
Reasons to end. (lack of Software drives for Silicon !)
Intel ended support on a vast sea of GPU/CPU (GMA graphics by them) GMA-3100 is not supported after W7. (ended in 2007) as in Dead ! (Windows will show up in GPU LIMP mode called MBDA
Intel Chipset's older than Q31 are not supported, or with huge limits. (32bit might run to some extent)
In most cases (32bit) old CORE2 CPU runs great, not the iGPU. The 64bit will only like the most new CPU CORE2 and newest stepping codes.
Intel only supports FULLY these CPU now (and its GMA and its Chipset)
W10 32bit for sure runs on more CPU's.
Intel ended 32bit support. (on all new silicon)
Intel does not support the older IGPU, like GMA-3100 located in the CORE2 packaged chip(CPU+iGPU)
MS can block installs based on many factors. (and is very tricky to understand and track across 6 years of W10 evolution)
The MS blocks can be for BIOS version, or iGPU or CPU too old and can get worse in time, MS does delete things chip makers end support on. <<< this is key fact to learn if using a 2007 PC.
Too little RAM or too slow CPU. clock. 1GHz. min.
MS, 64bit is even more strict on CPU that run and the worse are CORE2 with old stepping, always run the QUAD CORE2 not DUO and run newest intel stepping code.
MS can change the rules at every new W10 build. ( that is why if you are wise buy a used PC (to save money only) with I5 4xxx CPU model numbers.
Buy Gen 4 up, circa June 2013, up. do not go lower. (IMO)
In your mind imagine a line of no support walking forward in time. This is reality. (use this fact to buy used PCs)
In all cases, talk to your OEM PC maker , if Dell ask at Dell.com
Or just try it and see if it works W10 is always free to try for 30 days. DO IT and see. (use a spare good HDD to test this idea?)
GPU, Makers No longer in business, or left THAT business to make other things, but not this old CHIP or Device.)
Here is another list of defunct computer makers.
If W10 fails for only the GPU , try a newer GPU card, like GTX-7xx and up. (Nvidia and AMD both tell you what cards they sell that run on W10) go there and read.)
My cheap skate ($13) W10 GPU card list is here,
W10 will love to fail 2007 and older PCs, and for Sound chips and LAN, and GPU, a vast sea of chips made and no support at all.
If W10 fails reboot the PC 3 times to cause the magic, Windows self repair mode to run. (even connect up the Ethernet cable to your router to make this magic work 10x better?)
The oldest PC I found to run W10-64 was year 2005 Intel 945G D940 up CPU is must. Presler.( a real Intel motherboard) but I had to put in a new GPU card to make it run right. (my tests, alone)(and newest stepping CPU)
Common but very old PC with chips seen today (relics) and are in the hopeless list
AVOID like the Plague.
VIA, SIS or S3 ( dead)
AMD nforce chip set, ended at W7 as seen here (click legacy) clear as day the maker. Nforce 4 and older ended at VISTA.
Do not buy any PC or motherboard with these junk chip sets.
Version 1. 1-1-2021 (my dead pool page) My record PC for w10-32 bit is 2005. oldest. Dell D520 laptop 945GM ,core2 mobile. (wow)