СаркозаН, как вариант через
RegExp (Computer-1/File_1):
Код:

Set objRegExp = CreateObject("VBScript.RegExp")
Set objNetwork = CreateObject("WScript.Network")
Set objShell = CreateObject("WScript.Shell")
objRegExp.Pattern = "^Computer-\d+$"
objRegExp.IgnoreCase = True
strComputer = objNetwork.ComputerName
If objRegExp.Test(strComputer) Then
objRegExp.Pattern = "^.*?(\d+)$"
strFile = "File_" & objRegExp.Replace(strComputer, "$1") & ".exe"
WScript.Echo "FileName: "& strFile
objShell.Run "strFile"
Else
WScript.Echo "Computer Name Error!"
End If