Are you sure Windows Update is stuck at 2%? Did you let it run all night? You need some patience. That update fixes a lot of problems and takes a LONG TIME.
My Banggood X98Pro Windows 10 runs as good as any fast desktop. It’s pretty cool.
Look at what I did in my previous post
Report back what happened with your tablet. Have FAITH in Windows 10.
Mines been pretty great from the start. If I had those problems I would reinstall windows. Android has had some problems and still has some but windows has always been good