Script is hanging, cannot figure out why.

[PsychOfMSE]

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#AutoIt3Wrapper_Res_Comment=CHI Citrix Uninstaller
#AutoIt3Wrapper_Res_Description=This application will uninstall any version of Citrix Online Plugin
#AutoIt3Wrapper_Res_Fileversion=1.0.1.0
#AutoIt3Wrapper_Res_FileVersion_AutoIncrement=P
#AutoIt3Wrapper_Res_ProductVersion=1.0
#AutoIt3Wrapper_res_requestedExecutionLevel=requireAdministrator
#AutoIt3Wrapper_Icon=favicon.ico

Global $x86 = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\ICA Client\", "ClientName")
Global $x64 = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\ICA Client\", "ClientName")
Global $receiver_Present = FileExists("C:\ProgramData\Citrix\Citrix Receiver (Enterprise)\TrolleyExpress.exe")
Global $receiver_Present_2 = FileExists("C:\ProgramData\Citrix\Citrix Receiver\TrolleyExpress.exe")
Global $PNAgent_x64_Upgrade = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Citrix\PluginPackages\XenAppSuite\PN_Agent\", "Version")
Global $PNAgent_x86_Upgrade = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Citrix\PNAgent\", "Version")
Global $Dragon_x64 = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Voice\SpeechRecognition\Engine", "Dragon NaturallySpeaking")
Global $Dragon_x86 = RegRead("HKEY_LOCAL_MACHINE\SOFTWARE\Voice\SpeechRecognition\Engine", "Dragon NaturallySpeaking")
Global $Dragon_Installed
Global $Dragon_Installed_x64
Global $Dragon_Installed_x86

If Not $Dragon_x64 = "" Then $Dragon_Installed_x64 = 1
If Not $Dragon_x86 = "" Then $Dragon_Installed_x86 = 1
If $Dragon_Installed_x64 = 1 Or $Dragon_Installed_x86 = 1 Then $Dragon_Installed = 1

If Not FileExists(@ProgramFilesDir & "\Citrix\") then Exit

IniWrite(@tempdir & "\ClientName.ini", "section1", "ClientName", $x86)
IniWrite(@tempdir & "\ClientName.ini", "section2", "ClientName", $x64)

Func Cleanup()
    FileDelete(@TempDir & '\ReceiverCleanupUtility.exe') ;File Cleanup
    FileDelete(@TempDir & '\CitrixUninstallPrevious.bat') ;File Cleanup
EndFunc   ;==>Cleanup

;File installation from executable
FileInstall("C:\AutoItCitrix\CitrixUninstallPrevious.bat", @TempDir & "\", 0)
FileInstall("C:\AutoItCitrix\ReceiverCleanupUtility.exe", @TempDir & "\", 0)


;This block will check for remotescan and if it exists then exits.
If FileExists("C:\Program Files (x86)\RemoteScan Server\server.ini") Then
    Call("Cleanup")
    Exit
ElseIf FileExists("C:\Program Files\RemoteScan Server\server.ini") Then
    Call("Cleanup")
    Exit
Else
EndIf

;Checks for Citrix receiver and exits if present.
If $receiver_Present = 1 Then
    Call("Cleanup")
    Exit
Else
EndIf

;Checks for Citrix receiver and exits if present.
If $receiver_Present_2 = 1 Then
    Call("Cleanup")
    Exit
Else
EndIf

;Checks for Citrix PNAgent 12.3.0.8 and if it exists then exits.
While Not StringInStr($CmdLineRaw, 'Disable_12_3_Skip="True"', 0, 1)
If $PNAgent_x64_Upgrade = "12.3.0.8" Then
    Call("Cleanup")
    Exit
ElseIf $PNAgent_x86_Upgrade = "12.3.0.8" Then
    Call("Cleanup")
    Exit
EndIf
Wend

;Uninstall any previous citrix version
FileChangeDir(@TempDir)
RunWait(@ComSpec & " /c " & "CitrixUninstallPrevious.bat" & " /c ", "", @SW_HIDE)
FileChangeDir(@TempDir)
RunWait(@ComSpec & " /c " & "ReceiverCleanupUtility.exe" & " /silent ", "", @SW_HIDE)
DirRemove(@ProgramsCommonDir & "\Citrix\", 1)
Call("Cleanup")
IniWrite(@TempDir & "\UninstallPrevious.ini", "section1", "Uninstall", "True")
Shutdown(6)

The script is working fine on my end but when some users at different sites try to run it the script will uninstall Citrix just fine but will not reboot and just sits in the task tray indefinitely.  The majority of the issues are coming from Windows XP devices, Windows 7 devices seem to work just fine.

Can anyone see anything glaringly wrong?

Edited October 17, 2013 by PsychOfMSE

[JohnOne]

I'd use TrayIconDebug option to see exactly where the script is hanging.