Share via

Microsoft .NET Framework "Unhandled Exception.... The remote server returned an error. (404) Not Found."

Anonymous
2021-02-22T19:50:21+00:00

Hi!

So I'm having a bit of nightmare with this error message, it appears every time I startup about a minute or so after boot. I have entered countless forums and tried different techniques including:

Performed scan on Command Prompt

Unchecked and rechecked .NET on Windows Features

Rebooted inbetween each sequence 

.NET Framework Repair Tool

I have also installed the latest Windows update I was holding back on.

Nothing seems to be working! Everytime after booting this error message appears, anyway if anybody could help me that would be amazing, the Details under the error code are as follows:

"See the end of this message for details on invoking 

just-in-time (JIT) debugging instead of this dialog box.

************** Exception Text **************

System.Net.WebException: The remote server returned an error: (404) Not Found.

   at System.Net.WebClient.DownloadDataInternal(Uri address, WebRequest& request)

   at System.Net.WebClient.DownloadData(Uri address)

   at System.Net.WebClient.DownloadData(String address)

   at (Object , String )

   at A.XN.C(Object X, String C)

   at ComAppEvent.Form1.DownGradeStage(String exeUrl)

   at ComAppEvent.Form1.Form1_Load(Object sender, EventArgs e)

   at System.EventHandler.Invoke(Object sender, EventArgs e)

   at System.Windows.Forms.Form.OnLoad(EventArgs e)

   at System.Windows.Forms.Form.OnCreateControl()

   at System.Windows.Forms.Control.CreateControl(Boolean fIgnoreVisible)

   at System.Windows.Forms.Control.CreateControl()

   at System.Windows.Forms.Control.WmShowWindow(Message& m)

   at System.Windows.Forms.Control.WndProc(Message& m)

   at System.Windows.Forms.ScrollableControl.WndProc(Message& m)

   at System.Windows.Forms.ContainerControl.WndProc(Message& m)

   at System.Windows.Forms.Form.WmShowWindow(Message& m)

   at System.Windows.Forms.Form.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: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/Windows/Microsoft.NET/Framework/v4.0.30319/mscorlib.dll

ComAppEvent

    Assembly Version: 1.0.0.0

    Win32 Version: 10,8,0,1160

    CodeBase: file:///C:/ProgramData/Microsoft/Windows/Start%20Menu/Programs/StartUp/Waveshell_dx.exe

Microsoft.VisualBasic

    Assembly Version: 10.0.0.0

    Win32 Version: 14.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Microsoft.VisualBasic/v4.0_10.0.0.0__b03f5f7f11d50a3a/Microsoft.VisualBasic.dll

System

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System/v4.0_4.0.0.0__b77a5c561934e089/System.dll

System.Windows.Forms

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Windows.Forms/v4.0_4.0.0.0__b77a5c561934e089/System.Windows.Forms.dll

System.Drawing

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Drawing/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Drawing.dll

System.Configuration

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Configuration/v4.0_4.0.0.0__b03f5f7f11d50a3a/System.Configuration.dll

System.Core

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Core/v4.0_4.0.0.0__b77a5c561934e089/System.Core.dll

System.Xml

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Xml/v4.0_4.0.0.0__b77a5c561934e089/System.Xml.dll

Accessibility

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/Accessibility/v4.0_4.0.0.0__b03f5f7f11d50a3a/Accessibility.dll

System.Runtime.Remoting

    Assembly Version: 4.0.0.0

    Win32 Version: 4.8.4084.0 built by: NET48REL1

    CodeBase: file:///C:/WINDOWS/Microsoft.Net/assembly/GAC_MSIL/System.Runtime.Remoting/v4.0_4.0.0.0__b77a5c561934e089/System.Runtime.Remoting.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:

<configuration>

    <system.windows.forms jitDebugging="true" />

</configuration>

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."

Thanks!

Windows for home | Windows 10 | Performance and system failures

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments

Answer accepted by question author

  1. Anonymous
    2021-02-23T10:01:59+00:00

    Hi,

    Thank you for writing to Microsoft Community Forums.

    I understand that you’re receiving error when booting the PC. I will certainly try my best to assist you with the issue.

    For further clarity on the issue, please respond to the questions below:

    1. Which build version of Windows 10 are you using currently?
    2. Are you aware of any changes made to the PC prior to which you weren’t facing this issue?

    Refer the article Which version of Windows operating system am I running?

    Meanwhile, I would suggest you to try booting the PC in Clean Boot and see if you receive the error. Refer the article How to perform a clean boot in Windows

    Performing a clean boot will start the computer with minimal set of drivers and programs, to determine whether a background program is causing the issue. Some of the Startup programs will not load after performing a clean boot on the computer. However, that functionality will return when you reset the computer to start normally after finishing the troubleshooting.

    If the error doesn’t occur after performing Clean Boot, then please refer the section How to determine what is causing the problem after you do a clean bootto identify the root cause of the issue.

    Note: Please refer the sectionReset the computer to start normally after clean boot troubleshootingto boot the computer in to normal mode after troubleshooting

    Let us know if you need any further assistance, we will be glad to assist you.

    Regards,

    Prakhar Khare

    Microsoft Community – Moderator

    1 person found this answer helpful.
    0 comments

1 additional answer

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2021-02-23T12:42:42+00:00

    Hi Prakhar,

    Thanks for the reply, it does seem that disabling all applications on startup has worked.

    I think the faulty app was an unused audio driver that I have now deleted.

    Thanks for your help!

    Mitch

    1 person found this answer helpful.
    0 comments