How to fix error 0xC004F078 when activating Windows 10

As with most of the programs that we install on our computers, at least with the commercial ones, these require some type of activation or code to guarantee that we have acquired the product legally and legally, as is the case with the operating system , Windows 10.

However, due to the extension of this particular software , it is worth mentioning that Windows 10 has a somewhat more complicated mechanism than usual to carry out its activation , something that is done to help in the verification of the original copy . Of course, although we really have a legitimate version of the system, sometimes it launches the error codes 0xc000f074 or 0xC004F078 , something that occurs if the computer can not access the key management service or if the key used in the call to the “SLSetAuthenticationData” function, it is incorrect.

error 0xC004F078 indicates that the software licensing service reported that the key does not match a valid one

In this way, these are some error codes that appear on a regular basis on computers that are updated to Windows 10 from Windows 7 or Windows 8.1 . When this occurs, we can find messages that will indicate that Windows can not access the activation service of the company and asks us to connect to the corporate network or contact the person in charge of the system, including the error code 0xC004F074 or 0xC004F078.

How to troubleshoot Windows 10 product activation problems

At the same time, we must know that the error 0xC004F074 indicates that the Software Licensing Service informs that the computer can not be activated due to the inability to contact the Key Management Service or KMS . On the other hand, error 0xC004F078 indicates that the software licensing service reported that the key does not match a valid one.

Be that as it may, in the event that we can not activate Windows 10, here are some methods to correct this operating system activation error . It is clear that the first thing we have to do is to check thoroughly that we have entered the product key correctly, since it is not usually easy and it is the most common failure before complicating ourselves with something else.

We can also try to use the Windows command prompt to reinstall the key, for which we access this section through the command “cmd” with administrator permissions and execute the commands that we are going to expose you. First, to uninstall the existing key, type “slmgr.vbs / upk“, while to install the KMS product key, type “slmgr.vbs / ipk .

Once this is done, the team will ask if the operation was a success or not, so if not, to activate online we write “slmgr.vbs / ato”, while to do it by phone we opt for “slui.exe 4 ” To finish and if none of this works, we can try it through the function to solve problems of Windows 10 itself, found in “Configuration / Update and security /” Activation“.


Professional writer with more than 7 years of experience. Edward has worked as a content creator and editor on different web pages. He has been coordinator and content manager in various editorial teams. He also has extensive experience in SEO and digital marketing.