Adds UI configuration description for path env

Author: LordHepipud

doc/knowledgebase/IWKB000005.md

@@ -42,6 +42,8 @@ The `icingapowershell` service of the `Icinga for Windows` solution is unable to
 
 ## Solution
 
+### With PowerShell
+
 To resolve this issue, ensure that your `PATH` environment variable is containing a directory which inherits a `powershell.exe`. By default, this should be `C:\Windows\System32\WindowsPowerShell\v1.0`.
 
 You can check this by opening a PowerShell by running the following command:
@@ -85,3 +87,39 @@ Restart-Service 'icingapowershell'
 ```
 
 Now the error should be resolved the the service should be running.
+
+### With UI
+
+You can use the UI for modifying the `PATH` variable. Please follow the steps below
+
+* Click on `Windows/Start` with the right mouse button
+* Click on `System`
+* In the new windows click in `Advanced System Settings` (on Windows 2012 R2 or older on the left side, on Windows 2016 or newer on the right side)
+* Click on the `Advanced` tab
+* Click on `Environment Variables`
+* In the section `System variables` locate the entry `Path` and double click or simply left click to select it and then click the `Edit` button
+
+Windows 2012 R2 or older:
+
+* Jump to the end of the textbox `Value of Variable` (containing different directories) and add a `;` if not already present. Afterwards add the path containing your `powershell.exe`, like `C:\Windows\System32\WindowsPowerShell\v1.0`
+* Close all windows by clicking on `OK`
+
+Windows 2016 or newer
+
+* Click the `New` button on the top-right of the new window
+* Add the path containing your `powershell.exe`, like `C:\Windows\System32\WindowsPowerShell\v1.0` on the newly created entry
+* Close all windows by clicking on `OK`
+
+Now open a new PowerShell session again and check of the new directory was added:
+
+```powershell
+($ENV:Path).Split(';')
+```
+
+Once the directory is there, restart the `icingapowershell` service by running
+
+```powershell
+Restart-Service 'icingapowershell'
+```
+
+Now the error should be resolved the the service should be running.