0x80004001 is an error code that Windows users encounter quite commonly.
This error usually occurs when users try to update an old Windows application or attempt to run a certain application. When this error appears on the screen, the system automatically restarts to stop further processing. The error results in a blue screen after the system boots.
This blue screen is known as the Blue Screen of Death.
There are different files in the Windows operating system responsible for its smooth functioning. Sometimes problems like viruses or incorrect register entries corrupt or damage these files. This is when this 0x80004001 error appears.
Simply put, some of the most common causes that trigger 0x80004001 error are listed below as follows.
Irrespective of what causes this error, it is of utmost importance to troubleshoot it as soon as possible.
While there are several ways of troubleshooting this error, the two most useful approaches have been listed below as follows.
Use any of the methods listed above to get rid of the 0x80004001 error once and for all.

0x80004005 Outlook is an error that users commonly encounter while attempting to send or receive emails on Outlook.
The message that appears usually states “This message could not be sent. Try sending the message again or contact your network administrator."
The client operation failed. Error is [OX80004005- 0X0004B9-OXOO501].
This error is usually caused by a problem in the Local Area Network or LAN. What actually happens is that signals with the wireless LAN are lost or a connection problem occurs within the network cable.
As a result, the 0x80004005 Outlook error is triggered while sending or receiving an email. Sometimes the problem goes away on its own. However, if it recurs after a few hours, it shows that some problem exists within the network.
Also, it is important to understand that different factors can affect the quality of wireless connections in a network.
For instance, garage door openers, microwave ovens, and Bluetooth devices can easily become obstacles, disrupting the connection and causing the quality to degrade. Other causes are listed below as follows.
It is a must to fix this error otherwise potential risks associate with this error such as permanent damage and blue screens.
There are two ways to fix this error and both are listed below as follows.
Both these workarounds will work. Therefore, it is advised that you employ any one of them as per your needs.
When the Apps screen opens on the left click on Default apps.
On right, you will get a list of Windows default applications for certain types of files. Click on any application you would like to change and choose from the drop-down list a new one. Click on it and you are done. “The last product key you entered can’t be used on this copy of Windows (0xc03f6506).”This particular error tends to occur when you go on to activate Windows 10 although it can also appear during the upgrade process. In such cases, you will see the following error message:
“Unable to upgrade your edition, We can’t upgrade your edition of Windows. Try upgrading your edition of Windows again. (0xc03f6506).”To fix the Activation Error Code 0xc03f6506 in Windows 10, use the options provided below as references but before you proceed, make sure that you create a System Restore point first.
setup.exe /auto upgrade /pkey <YOUR WINDOWS 10 PRO EDITION PRODUCT KEY>After entering the command, check if it was able to fix the Windows Upgrade or Activation error 0xc03f6506. If not, refer to the next given option below.