Windows 10: Unable to update window 10 from version 1909 to 2004

hi i m using Lenovo G50-70, had tried to update the PC, however the window update show this when i tried download assistant and it checked hard disk space, RAM, processor are all in order to update and proceed to update and install until it appear this and unable to move from 99 to 100% for 24 hours. can I know what is wrong on this

:)

 

windows 10 updates versions 1909 and 2004

Windows 10/64 bit computer <> I cannot update windows versions at all , no 1909 no 2004 , contacted windows an dthey can't help me at all

 

windows version 2004 update

After windows version 2004 update, internet is not working - tried all the trouble shooting steps but issue was persisted. Internet started to work only after reverting to previous version 1909

 

How to create a Win 10 version 1909 installation media to downgrade from version 2004?

After clean install pf Win 10 version 2004, system "Cannot connect to network". It was suggested I down grade to 1909.I have a version 2004 installation USB. I have a version 1909 ISO file. If I knew where the version 2004 was hiding, I could replace
it. Or I could create a new media, but all instructions lead to 2004 installs.