How to Fix 0x8007003b Network Error on Windows 10 & 11

Abruptly caught with error 0x8007003b on your windows? This is the most annoying thing that can happen. But do you know how to fix 0x8007003b?

Error 0x8007003b is an unexpected network error that can occur when copying a large file over a network connection. Various issues, including an unstable or slow connection, malware, or Windows Firewall settings, can cause this error.

When this error occurs, the computer typically displays a message saying, “The operation did not complete successfully. Error 0x8007003b”.

Sometimes you can get worried more if you have never encountered this error. However, several ways how to fix 0x8007003b and get your file transfer back on track.

How to Fix 0x8007003b

In this guide, we will discuss the causes of Error 0x8007003b and provide seven quick fixes for resolving the issue. We will also look at how to prevent this error from occurring in the future so you don’t have to worry about it again.

With these tips and tricks, you should be able to quickly and easily fix Error 0x8007003b and get your file transfer back up and running.

What Causes Error 0x8007003B

Error 0x8007003B is a network error that occurs when transferring files larger than 100MB over a network connection. Multiple factors, including an unstable network connection and Windows Firewall settings, can cause this error.

Unstable Network Connection

The main problem is often an unstable network connection that causes limitations in bandwidth. This can cause the transfer of large files to fail, resulting in the error 0x8007003B. If the network keeps fluctuating, the transfer of large files can be interrupted, resulting in an error.

Windows Firewall Settings

The potential cause of this error is Windows Firewall settings. Try disabling the Windows Firewall when transferring large files, as it is known to be causing the error. When you are finished transferring the files, enable your Windows Firewall again.

File Corruption

The most common cause of this error is file corruption. This can happen if a virus or program somehow alters your computer’s system files, resulting in an unexpected network error.

File corruption can be caused by various sources, from downloading malicious files to installing incompatible applications.

Drive Has Bad Sectors

Bad sectors on the drive where the file is being transferred from or to. Bad sectors can occur due to physical damage or wear and tear on the hard drive, preventing successful file transfers.

To fix this issue, you should run a disk check utility to identify and repair bad sectors on your hard drive.

Different Format of Target Location

Finally, Error 0x8007003b can occur if the target location has a different format than the source location. For example, if you are trying to transfer a file from an NTFS drive to an exFAT drive, then it may fail with this error code due to incompatibility between these two formats.

To fix this issue, you should ensure that both drives have compatible formats before transferring files.

Methods on How to Fix 0x8007003b on Windows 10/11

It is essential to fix when you encounter the error code 0x8007003b on your computer. This will allow you to continue transferring files and sharing easily and normally.

If it is your first time to come across this error code, don’t worry, as the methods below discuss how to fix 0x8007003b:

1. Scan for Malware

Malware is malicious software or program designed to damage, disrupt, or gain unauthorized access to a computer system. It can be spread through email attachments, links to malicious websites, downloads from suspicious sources, and other means.

Malware can also be programmed to infect computers without user intervention by exploiting operating system or software vulnerabilities.

Malware can cause various forms of damage, such as deleting important files, stealing confidential information, corrupting system settings, and even hijacking your device for malicious purposes.

Scanning your computer regularly for malware infections is important to prevent further damage. If you guess the error messages or other unexpected behaviors on your computer are signs of malware, it is time to scan for malware.

Here are the steps to scan for malware and viruses:

i) Open Windows Defender from the Start menu or search bar.

ii) Click Virus & Threat Protection and then click Scan options.

iii) Select Full Scan and click Scan now to start scanning your system for malicious software or viruses.

iv) Wait for the scan to complete and remove any malicious software detected during the scan process.

v) Once the scan is complete, restart your computer and try transferring the file again to see if it works now without getting any errors.

Tip: By regularly scanning your computer with reliable antivirus software and keeping it updated with latest security patches, you can help protect your device from malicious attacks and reduce the risk of getting this error.

2. Temporarily Switch off Anti-Virus Software

Do you know that a temporary switch off of anti-virus software on your system can be very helpful sometimes? Anti-virus software is essential to protect your system from malicious programs.

But it is also true that sometimes, this anti-virus software can cause conflicts with system files and processes. When such a conflict occurs, it can cause the 0x8007003b error to appear. So you must try to switch off the software.

Here are the steps:

i) Open the Control Panel by going to the Start Menu and locating All Programs.

ii) Click on System and Security > Windows Defender Firewall > Turn Windows Defender Firewall on or off.

iii) Select “Turn off Windows Defender Firewall (not recommended)” for both Private and Public networks, then click OK to save changes.

iv) Restart your computer to check if the error has been fixed..

If you have any other third-party antivirus software installed, you may need to disable it to fix this error code 0x8007003b. You can also try scanning for malware and viruses using an anti-virus program to ensure your system is clean from any malicious programs causing this issue.

3. Disable the Windows Search service

Disabling the Windows Search service is a way to stop Windows Search from running on your computer. It can be done by opening the Services app, searching for “Windows Search” and double-clicking it.

Then, in the “Startup type” drop-down menu, select the “Disabled” option. This will prevent Windows Search from loading the next time you start your computer. Below are the steps to temporarily switch off anti-virus software.

i. Open the Windows Start menu and type “services” in the search box.

ii. Select “Services” from the list of results.

iii. Scroll down until you find “Windows Search” and double-click it to open its properties window.

iv. In the General tab, change the Startup type to “Disabled” and click Apply, then OK to save your changes.

v. Restart your computer for the changes to take effect.

Once you have disabled the Windows Search service, you should no longer encounter error 0x8007003b when transferring large files over a VPN connection.

If you are still having issues, it may be worth checking your antivirus software or firewall settings and ensuring that your router is working properly and not experiencing any outages or slowdowns in performance.

4. Check for the Formatting

If you are transferring a large file, it is recommended to check that it is in the correct format for your device. If the file is not in the right format, it may not be compatible with your device and will not transfer properly.

Additionally, if there are any errors in the formatting of the file, this could also lead to Error 0x8007003b being displayed. To check the file formatting, you need to follow the steps below:

1. Right-click on the file you want to transfer and select Properties.

2. Under the General tab, you will see the File type and size.

3. Check that the file type matches the format your device can accept.

Tip: Some devices may only be able to convert certain file types into a format they can accept.

If the formatting is correct, you can transfer the file without issues. If there are still problems, it may be worth running a disk check to ensure there is no problem with the disk or directory you are saving to. This can be done by typing chkdsk /f into an elevated command prompt.

5. Use System File Checker to Scan the Files

You should use the  (SFC) System File Checker tool to scan system files which are all protected, and replace any corrupted ones with the cached copy stored in a compressed file or folder at .

To use SFC, open Command Prompt as an administrator and type “sfc /scannow” into the prompt window. This will initiate the scanning process, which may take some time depending on how many files need to be scanned. Once complete, restart your computer and try transferring the file again.

Windows file checker also allows you to scan specific files instead of all system files. To do this, open Command Prompt as an administrator and type “sfc /scanfile <filename>” into the prompt window, replacing <filename> with the path and filename of the file you want to scan. Once complete, restart your computer and try transferring the file again.

6. Perform a system restore

The error code 0x8007003b may mean a hitch with the previous process you did to your computer. This process can be like changing the file format, installing a new app or driver, etc.

To fix this error, restore your computer’s system and return to your previous configuration.

Here are the steps:

1. Press the Windows logo key + R simultaneously to open Run.

2. Type “rstrui” and press Enter.

3. In the System Restore window, click Next.

4. Choose a restore point when your computer works normally and click Next.

5. Confirm the operation by clicking Finish, then click Yes when prompted.

6. Finally, restart your computer to complete the system restore process.

Doing a system restore will not affect your files, but it might undo some recent changes that you did in the settings of your computer.

Do this if you think the error code 0x8007003b is caused by a change you recently made to your computer, but if the problem persists, you should try other solutions on how to Fix 0x8007003b.

7. Disable Third Party/Antivirus or Firewall

Sometimes, fixing error code 0x8007003B can be as simple as disabling the third-party antivirus or firewall installed on your system.

Since these are essentially security software, they often block certain system processes from running, which could cause the 0x8007003B error. Disabling third-party antivirus and firewall protection can be done in simple steps.

1. From search results, type to open Window security.

2. Click on  Virus & threat protection and click Manege settings from Virus & threat protection settings.

3. Right-click the Windows Defender icon in the System Tray and select Virus & threat protection.

4. Slide the knob to the left to turn OFF virus & threat protection.

5. Select Firewall & Network and slide the knob to the left to turn OFF Firewall & network protection.

6. If you have installed a third-party firewall software, you can disable it by opening its program icon at the right of the Windows taskbar and hovering over your computer’s Antivirus, then Firewall again and Defence+ to disable them. 

7. Finally, if your Windows firewall is misbehaving due to a newly installed third-party firewall software, you can disable it by going into Control Panel > System and Security > Windows Firewall > Turn Windows Firewall on or off > Turn off Windows Firewall (not recommended).

The above solutions on how to fix 0x8007003b should let you fix the error once and for all without spending much of your time. If you have other questions, contact Microsoft support to resolve your error.

Read: How to Fix 0x800701b1 on Windows 10 and 11


In summary, the 0x8007003b error is a common issue experienced by Windows users. Corrupted files, hardware issues, or outdated drivers can cause it.

To fix this error, you should try basic troubleshooting steps such as cleaning your system registry and updating your drivers. You can also use System Restore to restore your system earlier date before you add some software and updated drivers.

Either of the above solutions on how to fix 0x8007003b coder error should work. Just try one after the other until you get your error resolved. If none of these solutions works, you may need to contact a computer technician for assistance in resolving the issue.

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