external calls - RunProcess seemingly does not work on my Windows system

System: Windows 10 professional. Mathematica Version: 10.3.0 English.

RunProcess doesn't work in my computer as described in tutorial.

The right result the function should give:

I tried different RunProcess examples given in the documentation and it seems that most of them work on Windows not as expected. For instance:

RunProcess[$SystemShell, All, "echo example line 1

 echo example line 2
 exit
 "]

Outcome as follows:

<|"ExitCode" -> 0, 
 "StandardOutput" -> 
  "Microsoft Windows [\[Degree]æ\[PlusMinus]¾ 10.0.10586]


  (c) 2015 Microsoft Corporation¡£\[PlusMinus]Some text...

  C:\Users\Veya\Documents>echo example line 1
  example line 1

  C:\Users\Veya\Documents>echo example line 2
  example line 2

  C:\Users\Veya\Documents>exit
  ", "StandardError" -> ""|>

And it should be shorter:

<|"ExitCode" -> 0, "StandardOutput" -> "example line 1
  example line 2
  ", "StandardError" -> ""|>

Question: What am I doing wrong? Are problems due to my Windows settings? How can I get results looking as described in the documentation?

---

Why I need RunProcess

I want to use MaTex in Mathematica; it is based on RunProcess.

---

Addition:

I've also directly tried Environment command from documentation but get $Failed.

 Environment["HOME"]
> $Failed