I have Win10 installed on a cheap tablet/laptop combo. It's OK. I had a couple of updating issues too - the problem was insufficient storage space. The tablet/laptop only came with 32Gb of SSD storage. So I added a 32Gb microSD card for additional storage and moved a bunch of stuff from the main SSD onto the microSD and freed up some space. Next time it tried to update it completed successfully.
Not sure if that is related to your issue or not, but that's what mine was.