Windows 10: Windows version 20H2 can't be installed

I use Windows 10 for last 4 years and so far everything has been normal. Now I can't install version 20H2. I tried most of offered in internet solutions. Tried to update with Media creation tool. Checked space, date, time and location. Scanned with cmd repairing the system. Updated the drivers from the official manufacturer site.The PC is Lenovo, 64 operating system. Windows 10 home, version 1909. Lenovo System Update says I am up to date, Windows Update says I have missing important updates. I can't install version 20H2. The installation failed in the SAFE_OS phase with an error during BOOT o

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windows xp installation and dual core am

could someone please list the steps they follow to install windows with a dual core processor and windows xp service pack to. I'm reletively new to amd dual core and i feel i'm missing a step. All help will be appreciated. thanx

 

Windows 10 version 20H2

The computer in question had Windows 7 on it and there was not an option to uninstall the 20H2 update. So I have reverted back to Windows 7. Is there a way to download and install Windows 10 version 2004? The games will work on that version but not the
20H2 version.

Thanks

 

Windows 10 version 20H2

I down loaded windows 10 version 20H2 and now many games I play on FB are VERY slow. The games worked ok on version 2004. Question if I down load version 2004 will it override version 20H2, or do I need to remove version 20H2 prior to downloading version
2004?

Thanks.