Software⏱️ 3 min read📅 2026-06-19

How to Fix: BITS Upload Error in IIS 7 Win 2008 R2 SP 2

IIS 7 BITS upload error in Win 2008 R2 SP 2, SCCM 2012 server installation

Quick Answer: Check event log for more details about the exception and ensure that the External Component has been properly configured.

📋 Table of Contents

  1. ⚠️ Common Causes
  2. ✅ Best Solutions to Fix It
  3. 💡 Conclusion

The BITS (Background Intelligent Transfer Service) upload error in IIS 7 on Windows Server 2008 R2 SP 2 can be frustrating, especially for SCCM (System Center Configuration Manager) server installations. This error occurs when the BITS service fails to enable file uploads, preventing clients from uploading files to the server.

Enabling BITS uploads is a crucial step in setting up SCCM, as it allows clients to upload files and patches to the server. The error message 'External component has thrown an exception' indicates that there may be a problem with the BITS service or its configuration.

⚠️ Common Causes

  • The primary reason for this error is a misconfigured BITS service or a corrupted BITS service executable. This can occur due to various reasons such as incorrect registry settings, corrupted system files, or conflicts with other services. To resolve this issue, it's essential to identify and correct the root cause.
  • Another possible reason for this error is a problem with the IIS Manager configuration or the Windows Server 2008 R2 operating system. This could be due to a software conflict, incorrect registry settings, or a hardware issue.

✅ Best Solutions to Fix It

Enabling BITS Uploads using the IIS Manager

  1. Step 1: Step 1: Open the IIS Manager and navigate to the Default Website. In the right-hand Actions panel, click on 'Edit Application Pool'. Select the application pool associated with the default website.
  2. Step 2: Step 2: In the Application Pool Settings window, scroll down to the 'Process Model' section and ensure that the 'Enable 32-bit Applications' checkbox is not selected. This setting can cause issues with BITS uploads.
  3. Step 3: Step 3: Navigate back to the main IIS Manager window and select the Default Website in the right-hand Actions panel. Click on 'Edit Bits Uploads' and then click on 'Allow Clients to Upload Files'.

Enabling BITS Uploads using the Registry

  1. Step 1: Step 1: Open the Registry Editor (regedit.exe) and navigate to the following key: HKEY_LOCAL_MACHINE\System\Servicesits. Ensure that the 'Bits' subkey exists and has the correct configuration.
  2. Step 2: Step 2: In the 'Bits' subkey, set the value of the 'Enable BITS Uploads' registry entry to '1'. This will enable file uploads for the BITS service.

💡 Conclusion

To resolve the BITS upload error in IIS 7 on Windows Server 2008 R2 SP 2, try enabling BITS uploads using the IIS Manager or by modifying the registry. If the issue persists, it may be necessary to consult further troubleshooting steps or seek assistance from Microsoft support.

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