run as admin
C:\Windows\Microsoft.NET\Framework64\v4.0.30319>dism /online /enable-feature /featurename:IIS-ASPNET45
might need to enable this extensions:
C:\Windows\Microsoft.NET\Framework64\v4.0.30319/dism /online /enable-feature /featurename:IIS-ApplicationDevelopment C:\Windows\Microsoft.NET\Framework64\v4.0.30319/dism /online /enable-feature /featurename:IIS-ISAPIFilter C:\Windows\Microsoft.NET\Framework64\v4.0.30319/dism /online /enable-feature /featurename:IIS-ISAPIExtensions C:\Windows\Microsoft.NET\Framework64\v4.0.30319/dism /online /enable-feature /featurename:IIS-NetFxExtensibility45 C:\Windows\Microsoft.NET\Framework64\v4.0.30319/dism /online /enable-feature /featurename:IIS-ASPNET45