Revert "Windows command scripts cleanup/ via @B00ze64"

This reverts commit db837204da.

@ingber: "2.0.9 works fine on my x64 Ubuntu VPS, but fails as did yours on Windows x64.
Your [@iWARR] solution on Windows works fine."

@iWARR: "I want to note, that *.bat file from v2.0.8 is able provide successfully
installation for the v2.0.9 pack, as usual. Other *.bat files from v2.0.8 are fine also."

windows/service-uninstall.bat

@@ -1,21 +1,23 @@
-@ECHO OFF & SETLOCAL ENABLEEXTENSIONS
+@ECHO OFF
 
-CD /d %~dp0
-SFC 2>&1 | FIND /i "/SCANNOW" >NUL:
-IF ERRORLEVEL 1 GOTO :ELEVATE
-GOTO :ADMINTASKS
+SFC 2>&1 | FIND /i "/SCANNOW" >NUL
+IF %ERRORLEVEL% NEQ 0 GOTO ELEVATE
+GOTO ADMINTASKS
 
 :ELEVATE
-
 ECHO Elevated privileges are temporarily required, just to register or remove the dnscrypt-proxy service
+CD /d %~dp0
 MSHTA "javascript: var shell = new ActiveXObject('shell.application'); shell.ShellExecute('%~nx0', '', '', 'runas', 1); close();"
 EXIT
 
 :ADMINTASKS
 
-dnscrypt-proxy.exe -service stop
-dnscrypt-proxy.exe -service uninstall
+CD /d %~dp0
 
-ECHO.
+CMD.EXE /c ".\dnscrypt-proxy.exe -service stop"
+CMD.EXE /c ".\dnscrypt-proxy.exe -service uninstall"
+
+ECHO ""
 SET /P _=Thank you for using dnscrypt-proxy! Hit [RETURN] to finish
+
 EXIT