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Error 0X8007003B is a network obstacle encountered by some Windows 10 and 8 users while transferring large files from a network drive to the desktop or laptop. The error message window 0x8007003b indicates that "0x8007003B: An unexpected network error has occurred." As a consequence, Windows 8 or 10 users cannot transfer all files to their VPN.
Network error 0X8007003B occurs when you transfer a large file larger than 100MB over a VPN connection.
Even though the Windows error 0X8007003B is associated with the network, it can be caused by a number of factors, including factors directly related to your computer. Some of the most important and notable reasons are but are not limited to;
- Unstable network connection which can also cause bandwidth restrictions.
- Un programa / software que ha instalado recientemente y que puede haber dañado los archivos del sistema o haber configurado mal la configuración del sistema.
- Interferencia causada por el firewall integrado y el programa antivirus instalado.
- Infección de virus / malware.
- Installation / file transfer Formatting of the destination that may have limitations.
- Bad sectors on the destination folder, which in most cases is the hard drive.
How to fix unexpected network error 0X8007003B in Windows:
There is no defined method to fix the 0x8007003b error because there may be a different combination of causes that cause this error. So try all the methods listed below and there is no guarantee that if something works for others, it will work for you as it depends from computer to computer. Therefore, you may need to try several methods before you can in short “Fix An unexpected network error 0x8007003B occurred.
Check the format of your hard drive
Windows and its memory have several different formatting methods, such as FAT32 or NTFS. The two methods have different limitations and some of them can cause this problem. What you need to check is the format of the destination drive you are copying the file to. If it is FAT32, please note that it only supports files smaller than 4 GB and is automatically locked near the end of the copy. This only happens with a single file larger than 4 GB. So if there are a lot of smaller ones, it should be fine.
Even though this may seem like a much more complex obstacle than it really is, basically follow the above methods and you should be completely fine.
Disable antivirus programs
Antivirus programs can also be the cause of network error 0x8007003B. All you need to do is disable or disable antivirus programs for a limited time and check if the error still occurs or not.
Step 1: On the taskbar, right-click your antivirus program and click Turn off automatic protection.
Step 2 – Select the amount of time you want to disable your antivirus program.
Step 3: Now repeat the file copy procedure and check if the network error 0X8007003B is fixed or not.
Disable the firewall
The main cause of the above error can sometimes be the Windows firewall, which can interfere with the file transfer. Let's see how to disable the firewall:
1. Press Windows + I button and select Control Panel.
2. Then click System and Security.
3. Then click Windows Firewall.
4. Now click on Enable or disable Windows firewall on the left side of the window.
5. Select Turn off Windows Firewall and restart your computer.
https://community.wd.com/t/0x8007003b-windows-10-wdmycloud/214508
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