did some rewrite to see the whole picture...
you used instring but that kinda is untrustable, as there could be similar section-names.
with ascan we get exact matches.
this is what I got:
Code:

  $RC = split(ReadProfileString("S:\Windows\WinDart.ini","",""),chr(10))
  If -1<ascan($RC,"ENV") and -1<ascan($RC,"Shell") and -1<ascan($RC,"Components")
    ? "WinDart.ini file checks out OK"
  Else
      $RC = split(chr(10)+ReadProfileString("S:\Windows\WinDart.ctx","",""),chr(10))
      If -1<ascan($RC,"ENV") and -1<ascan($RC,"Shell") and -1<ascan($RC,"Components")
        ? "WinDart.ctx file being copied to WinDart.ini"
        Copy "S:\Windows\WinDart.ctx" "S:\Windows\WinDart.ini"
      Else
        Copy "F:\Template\WinDart\WinDart.ini" "S:\Windows"
      EndIf
  EndIf
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