RSAT instalation

Open Powershell with Admin permissions and add the folowing:
Set Windows Update Server Key to 0
Set-ItemProperty -Path HKLM:SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU -Name UseWUServer -Value 0
Restart Windows Update Service
Restart-Service -Name wuauserv -Force
Get RSAT Tools
Get-WindowsCapability -Name RSAT* -Online | Add-WindowsCapability -Online
Set Windows Update Server Key to 1
Set-ItemProperty -Path HKLM:SOFTWARE\Policies\Microsoft\Windows\WindowsUpdate\AU -Name UseWUServer -Value 1
Restart Windows Update Service
Restart-Service -Name wuauserv -Force
Done