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I accidentally removed .net framework 4.5 feature from server manager in windows server 2016 machine. Now I'm not able to open any windows component (server manager , IIS , Powershell ...) where I'm getting this error :

To run this application,you first must install one of the following versions of the NET Framework: v4.0.30319 Contact your application publisher for instructions about obtaining the appropriate version of the .NET Framework.

I tried to install .NET Framework 4.7.1 , the installation finishes successfully , but when I reboot my computer , it turns up that the .net framework is not installed.

When I try to install v4 I get :

Microsoft .NET Framework 4 is already a part of this operating system, but it is currently turned off. To enable the .NET Framework 4 , use Turn Windows features on or off in Control Panel.

But unfortunately I'm not able to access server manager to install the feature.

any help would be appreciated

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