SQL Server Installation Error

 TITLE: Microsoft SQL Server 2012  Setup
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The following error has occurred:

Error while enabling Windows feature : NetFx3, Error Code : -2146498220 , Please try enabling Windows feature : NetFx3 from Windows management tools and then run setup again. For more information on how to enable Windows features , see http://go.microsoft.com/fwlink/?linkid=227143

For help, click: http://go.microsoft.com/fwlink?LinkID=20476&ProdName=Microsoft%20SQL%20Server&EvtSrc=setup.rll&EvtID=50000&ProdVer=11.0.2100.60&EvtType=0x681D636F%25401428%25401

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BUTTONS:

OK
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Problem - Dot Net framework 3.5 is not installed on your machine, or higher version is installed

Solution - Install Dot Net Framework 3.5


I tried the solution provided by Microsoft, but it doesn't helped me

.NET Framework 3.5 installation errors: 0x800F0906, 0x800F081F, 0x800F0907, 0x800F0922
"https://docs.microsoft.com/en-US/troubleshoot/windows-client/application-management/dotnet-framework-35-installation-error"

Enable some setting as given in above link
Then Open Control Panel
> Programs ans Features
> Turn Windows Feature On or Off
> Then click " .NetFramework 3.5( include .NET 2.0 and 3.0)"

These steps gives me below error and i follow some other steps

Then i tried to install DotnetFramework 3.5 manually

it throws error

Error Code 0x800F0954 (Windows 10)

Correct steps to install .NET framework manually (see below)

1. Right-click Start, and click Run
2. Type regedit.exe and click OK
3. Go to the following registry key:     HKEY_LOCAL_MACHINE\SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU
4. In the right-pane, if the value named UseWUServer exists, set its data to 0
5. Exit the Registry Editor
6. Restart Windows.


After install .netframework3.5 repeat above steps and revert the setting to original

RESTART machine and you will be able to install the SQL Server