Windows 10: 20H2 Slower than 1909 and i can't revert back to 1909

So, around a week or two ago i decided to update Windows 10 to 20H2. At first, i didn't notice that my Laptop was slowing down but as soon as i played a game, i noticed my Laptop slowing down and overheating more often. I tried to troubleshoot my Laptop Even checking and repairing system integrity but it didn't do anything. When i realized that it wasn't my apps that were the problem, it was too late and i could not rollback to 1909. I'm now here unable to do anything power intensive even editing without experiencing any annoying lag. Can someone please tell me how i can go back to 1909 or go to 2004 as i want my performance back and i need it.

:)

 

Completely missing Dot Net in Windows 10 -1909?

.NET Framework is built-into Windows 10 version 1903 and Windows 10 version 1909. It is not possible for at least this version of the .NET Framework to be installed.

The error you have received, is likely due to the fact the application you are attempting to use, is specifically trying to target a version of the .NET Framework you don't have installed. I suggest using official Microsoft tool to download a Windows 10 version 1909 ISO. You can use the Media Creation Tool and/or the Upgrade Assistant. Windows ISO Downloader was only recently updated to support .NET Framework 4.8 on November 8th 2019. If you were not using Version 8.22, and would like to still use the tool, you need to download that version.

RaymondCC .NET Detector looks at registry keys that are created when you install .NET Framework. It does not support the .NET Framework version that are included with Windows 8.0+

The built-in version of the .NET Framework for Windows 10 version 1903 was .NET Framework 4.8

.NET Framework 4.5+ has never been located in the list of Windows Features for any version of Windows. The lack of .NET Framework 3.5 is likely due to your WinSxS directory not containing it.

You can install .NET Framework 3.5 if you run the same command you ran, but provide a source, to the components you need.

This is due to the fact the .Net Framework 4.8 is already installed on Windows 10 version 1903 and Windows 10 version 1909. .NET Framework 4.8 is an in-place upgrade to .NET Framework 4.5

This normally only happens when you have moved vital folders like the user's profile to a non-standard location.

Your inability to install .NET Framework 3.5 is extremely easy to fix and likely the reason your unable to run the third-party application. Perform the following steps to solve that problem.

1. Download a Windows 10 version 1909 ISO
   
2. Mount the ISO within Windows 10
   
3. Run the following command, the command assumes, the drive letter assigned to the virtual mount is D:
   
   • DISM /Online /Enable-Feature /FeatureName:NetFx3 /All /LimitAccess /Source:d:\sources\sxs
     

Source: Deploy .NET Framework 3.5 by using Deployment Image Servicing and Management (DISM)

 

"Can 1909 be updated with 20H2"

Yes, I have had updates for 1909 and Windows Defender, also drivers etc.
I did have an update for 2004 but never installed it, then it was replaced by 20H2 and I never installed that either.
Then 20H2 was deleted and replaced by a step back note, which has been there some time and seems stuck -

 

Windows 10 1909 Causes Secondary Hard Drive to not be Recognized

Installing the Windows 10 1909 Update causes my secondary hard drive to not be recognized.

Steps to confirm issue:

• Secondary drive not visible in Windows Explorer
• Secondary drive not visible in device manager
• Secondary drive not visible in disk manager

Steps to replicate issue:

• Installing 1909 update

Steps to resolve issue:

• Uninstall 1909 update

Since updates can only be delayed for so long, an actual fix would be appreciated.