The error code 0x00000103 is associated with a Blue Screen of Death (BSOD) in Windows and refers to the bug check message MUP_FILE_SYSTEM. This indicates a critical system issue related to the Multiple UNC Provider (MUP).

Understanding MUP_FILE_SYSTEM:

• Multiple UNC Provider (MUP): MUP is a kernel-mode device driver in Windows that allows applications to access files stored on remote computers over a network using Universal Naming Convention (UNC) paths. For instance, you might use a UNC path to access files on a shared folder located on another computer on your network.

• MUP Bug Check: The error signifies that the MUP encountered invalid or unexpected data while processing a request related to a remote file system. This could happen due to various reasons, including:

  • Buggy Network Drivers: Faulty or outdated network drivers can lead to MUP receiving incorrect information about remote file systems, causing processing issues.
  • Corrupted System Files: Damaged system files related to MUP or the network subsystem can also contribute to MUP malfunctions.
  • Software Bugs: In rare cases, bugs in specific programs that heavily rely on UNC file access might trigger unexpected behavior in MUP.

Possible Causes of 0x00000103:

• Network Driver Issues: The most common culprit is a problem with the network drivers for your network adapter.
• Corrupted System Files: Damaged system files associated with MUP or networking can contribute to the error.
• Conflicting Software: In rare cases, specific software programs might interfere with MUP’s functionality.

Troubleshooting Steps for 0x00000103:

Here’s how to address the 0x00000103 error:

1. Update Network Drivers:

   • This is the primary step. Update the drivers for your network adapter with the latest version from the manufacturer’s website.

2. System File Checker (SFC) Scan:

   • Open Command Prompt (Admin).

   • Type the following command and press Enter:

     <code data-test-id="code-content" data-sourcepos="31:6-33:17">sfc /scannow
     </code>

   • This command scans your system files and attempts to repair any corrupted system files that might be affecting MUP.

3. Restart Network Services:

   • Open Command Prompt (Admin).

   • Type the following commands and press Enter after each one:

     <code data-test-id="code-content" data-sourcepos="42:6-51:22">net stop netlogon
     net stop lanmanserver
     net stop browser
     net rm registry lanmanserver
     net rm registry netserver
     net start netlogon
     net start lanmanserver
     net start browser
     </code>

   • This restarts essential network services that MUP relies on.

4. Check for Conflicting Software (if applicable):

   • If the error started occurring after installing a new program, consider temporarily uninstalling it to see if the BSOD resolves. This can help identify potential software conflicts.

5. Network Hardware Issues (Less Likely):

   • In rare cases, underlying hardware problems with your network adapter might contribute to the issue. If none of the above solutions work, consult a technician for further hardware diagnostics.

Additional Tips:

• Keep your Windows system updated with the latest patches and security fixes, which might include updates for network drivers.
• Avoid using outdated or unsupported network adapters.
• If you’re on a Wi-Fi network, try connecting your computer directly to the router using an ethernet cable to rule out Wi-Fi-related issues.

By focusing on network driver updates, system file integrity checks, and potential software conflicts, you can increase your chances of resolving the 0x00000103 error and preventing future BSODs related to accessing remote file systems.