VBScript : Find Windows Hardware Architecture
The following VBscript will establish whether the local system is x86 or x64 and enable you to execute further commands based upon this. Simply copy the code into a new .vbs file and add the additional steps within the if statement.
Set WshShell = WScript.CreateObject("WScript.Shell")
vArchitecture = WshShell.RegRead("HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Environment\PROCESSOR_ARCHITECTURE")
If vArchitecture = "AMD64" Then
'64 bit OS
wscript.echo "64-bit OS"
ElseIf vArchitecture = "x86" Then
'32 bit OS
wscript.echo "32-bit OS"
End If