i have kinda solve this issue (im using an old lenovo G510
1- go to your bios
2- disable switchable graphics (i choosed uma) i dont know if you have other options!
3- login and and remove your drivers and install (both intel and AMD)
(IMPORTANT for AMD and INTEL and even MICROSOFT to solve it)
(what i found is you need to install (18.104.22.168.4240 for intel 4600)
DO NOT UPDATE YOUR INTEL DRIVER!!!
it will crash and make you ANGRY again (cause amd driver will fail to found or update or etc)
even nvidia have this issue...
and the MOST IMPORTANT thing is that i install AMD drivers step by step (to help the windows or the hardware/software not to crash)
1- AMD whql 15.11.1beta-64bit-win10-win8.1-win7-nov14.rar
2- AMD non-whql-crimson-relive-16.2.1-sep20
3- AMD Drivers.19.12.3.win.10.Beta.x64
4- AMD Adrenalin-2020-Edition-20.11.1
5- AMD adrenalin-2020-20.12.1
(cause 20.11.0 or 20.11.2 had crashed and freezes on the login screen again!
i hope this solve your problems <3