thank for the reply.

i don't know what the system is on but let me copy the whole details for you...

See the end of this message for details on invoking
just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************
System.NullReferenceException: Object reference not set to an instance of an object.
   at Win7_Upgrade.PreInstall_Update.checkAppUpdates(String phase, Upgrade_info upgradeInfo, Boolean copyFile)
   at Win7_Upgrade.PreInstall_Update.start_update()
   at Win7_Upgrade.Wizard.scanSystem()
   at Win7_Upgrade.Wizard.Wizard_Activated(Object sender, EventArgs e)
   at System.Windows.Forms.Form.OnActivated(EventArgs e)
   at System.Windows.Forms.Form.set_Active(Boolean value)
   at System.Windows.Forms.Form.WmActivate(Message& m)
   at System.Windows.Forms.Form.WndProc(Message& m)
   at Win7_Upgrade.Wizard.WndProc(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message& m)
   at System.Windows.Forms.Control.ControlNativeWindow.WndProc(Message& m)
   at System.Windows.Forms.NativeWindow.Callback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)


************** Loaded Assemblies **************
mscorlib
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4200 (NetFxQFE.050727-4200)
    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v2.0.50727/mscorlib.dll
----------------------------------------
Win7_Upgrade
    Assembly Version: 1.0.0.0
    Win32 Version: 1.0
    CodeBase: file:///C:/Users/shenqi4ever/AppData/Local/DellWin7Upgrade/Win7_Upgrade.exe
----------------------------------------
System.Windows.Forms
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4016 (NetFxQFE.050727-4000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Windows.Forms/2.0.0.0__b77a5c561934e089/System.Windows.Forms.dll
----------------------------------------
System
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4016 (NetFxQFE.050727-4000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System/2.0.0.0__b77a5c561934e089/System.dll
----------------------------------------
System.Drawing
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4016 (NetFxQFE.050727-4000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Drawing/2.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll
----------------------------------------
AxInterop.SHDocVw
    Assembly Version: 1.1.0.0
    Win32 Version: 1.1.0.0
    CodeBase: file:///C:/Users/shenqi4ever/AppData/Local/DellWin7Upgrade/AxInterop.SHDocVw.DLL
----------------------------------------
Interop.SHDocVw
    Assembly Version: 1.1.0.0
    Win32 Version: 1.1.0.0
    CodeBase: file:///C:/Users/shenqi4ever/AppData/Local/DellWin7Upgrade/Interop.SHDocVw.DLL
----------------------------------------
Accessibility
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4016 (NetFxQFE.050727-4000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/Accessibility/2.0.0.0__b03f5f7f11d50a3a/Accessibility.dll
----------------------------------------
System.Management
    Assembly Version: 2.0.0.0
    Win32 Version: 2.0.50727.4016 (NetFxQFE.050727-4000)
    CodeBase: file:///C:/Windows/assembly/GAC_MSIL/System.Management/2.0.0.0__b03f5f7f11d50a3a/System.Management.dll
----------------------------------------

************** JIT Debugging **************
To enable just-in-time (JIT) debugging, the .config file for this
application or computer (machine.config) must have the
jitDebugging value set in the system.windows.forms section.
The application must also be compiled with debugging
enabled.

For example:


   


When JIT debugging is enabled, any unhandled exception
will be sent to the JIT debugger registered on the computer
rather than be handled by this dialog box.

And I m upgrading to the 32 bit windows 7 home premium.

newid12345,

Thank you for using the Dell Community Forum.

I have reported this information from other threads that people are receiving this error with the Upgrade Assistant. What exactly does the error read? I cannot make it out. What system is this on and are you upgrading to the 32 or 64 bit Windows 7?

erm....some help pls.....anyone.....:emotion-9: