Errors and Problems When Activating Windows 10: How to Fix Them

Windows 10 has been the desktop operating system par excellence for years. Not in vain are many hundreds of millions of PCs that use it every day, but in order to use it in its entirety, we first need to activate Windows .

With this, what we really want to tell you is that this Redmond operating system needs an activation key to function properly. In fact, you could say that one of the tasks we do as soon as we buy a new PC or install Windows 10 from scratch is to make sure it is activated. In this way we avoid problems or that it simply becomes useless over time.

Errors and Problems When Activating Windows 10

Moreover, without this activation, we will not be able to access certain functions of the software itself, and we will not be able to receive the security updates and maintenance of the signature. As you can imagine, to activate Windows 10 it is necessary that we have the corresponding key provided by the one who sold us the license.

How to activate Windows 10 on your PC

There are several ways to activate Windows 10 with its corresponding license, in fact the firm tries to make things easier for us in this regard. One of the most common is carried out during the operating system installation process itself. Therefore, if we already have the password to begin with, when we start with the installation the wizard will ask for it. In this way, when the process is finished, we will have Windows ready.

But if we do this once Windows 10 is on our computer, we have to go to the System Configuration application. For example, click on the Win + I key combination and go to the Update and Security / Activation section. Here we just have to click on Change the product key and enter it with the keyboard.

activar Windows

On the other hand, we have the possibility of linking the Windows 10 key to a Microsoft account, so the key will be saved on the firm’s servers. In fact, the system itself will inform us of the digital license linked to the account. But be that as it may, sometimes we can run into certain problems in the process of activating Windows. And it is that sometimes we can find the problem that, after buying the key to activate Windows 10, an error message appears indicating that it is not correct or that it does not work.

Fix the most common problems when activating Windows

That is why in these same lines we are going to talk about some of the most common errors in this regard, and how we are going to be able to solve them. All this will help us so that the messages with the failure do not appear on the screen again . Of course, we must be clear that if we try to activate a pirated system key, what we will show you here will not solve anything.

We must also bear in mind that, depending on the source of the purchase, it could be the case that the acquired key is false or invalid. That is why it is advisable to buy it from Microsoft or a reliable third-party vendor.

Use the troubleshooter

But if the key is valid but for something we cannot use it, to say that Windows 10 has a large number of functions to allow us to detect and correct errors . One of these and that can help us in this case, is known as a problem solver. To get hold of it, we only have to go to the Settings application and go to Update and Security / Activation. Then a window will appear in which we can click on the Troubleshoot link.

solucionar problemas

This is a link that will only appear when the system has a problem with activation, otherwise it will not appear. This will lead us to a wizard that we continue to fix the fault with which we are. If it does not find the problem and cannot activate the computer, Windows will give us the option to buy the key .

Use the CMD to change the product key

On the other hand, assuming that we have updated the operating system from Windows 7 to Windows 10, we can find that failure. And it may be the case that when trying to activate the system, we find a fault that does not leave us. To solve this error we delete the Windows key that we currently have. To do this, we must first open a command prompt window with administrator permissions . Then we type the following commands:


This will help us to know the activation ID in order to be able to eliminate it, so we point it from the corresponding field. Then, when we have the pointed ID, we execute the following command:

slmgr/upk ID de activación

Now we will see a message confirming that we have deleted the password, so we only have to re-enter the new one. This should activate Windows successfully and without problems.

Errors when activating Windows 10 and their solutions

Although we can find a large number of errors and problems, these are the most frequent and common that we can find, along with their solutions. These are the error messages that we can suddenly find when we try to activate the Redmond operating system.

The truth is that, as with many of the error messages that we find here, they are difficult to understand and decipher. This is precisely where we are going to give you a hand.

Error 0xc0020036

We start with this failure, which is one of the most common in this sense. To give us an idea, this error message indicates that we do not have a valid digital license to activate the operating system . Therefore, if when entering it we find the error 0xc0020036 on the screen, the first thing we will do is run the troubleshooter as we saw before. This way we ensure the correct functioning of the Windows activator as such. In addition, we can also make sure that the license provider has sold us a valid key. We must also log into the Microsoft account in the event that the key was linked to it. Thus we can activate Windows correctly and avoid this failure that we are commenting on.

Error 0xc004f075

Next we will talk about the error code 0xc004f075 that Windows Update shows if it detects an activation problem. Therefore, when the problem of Windows’ own functionality comes, the first thing is to run the Windows Update troubleshooter. We find this in the Update and security / Troubleshoot / Additional troubleshooters section, where we find Windows Update.

On the other hand, we must check the status of some Windows services and verify that they are all running or not. Specifically, the services that we must take into account in this section are the following: Windows Update Medic, DCOM Server Process Launcher, RPC Endpoint Mapper and Update Orchestrator Services. This ensures that the required services are available and working.

Another possible solution can be found in the SLMGR command that we execute from the command prompt with administrator permissions. In this case we only have to execute the following commands:

slmgr /ipk Clave_Windows slmgr /ato

Error 0xC004F074

Saying that this is an error that is related to the key management service, it is also very common when KMS-based triggers have been used in the past. Therefore, the error message 0xC004F074 indicates that the Software Licensing Service cannot be activated. The reason for all this is that it cannot connect to the Key Management Service or KMS. Therefore, at this point, the first thing we recommend is to check that we have entered the license key correctly.

On the other hand, it will also help us to reactivate Windows from the CMD or command prompt. To do this, we open a new window with the CMD command with administrator permissions and execute the following:

slmgr.vbs /upk slmgr.vbs /ipk CLAVE_PRODUCTO

Error 0xc004e016

In the event that we suddenly encounter error 0xc004e016 when trying to activate Windows, there are several solutions that we can use. The first thing to do is make sure that we have and are using the correct product key . After this, in this case we must make sure that the Internet connection works well. And is that in most cases this problem is due to a slow or non-existent Internet connection.

Therefore it is preferable to have a stable and reliable connection, for example connecting the cable instead of using Wi-Fi. Another solution, common in these types of problems, is to use the Windows 10 activation troubleshooter , as we saw before. On the other hand we can also try to activate Windows 10 with a clean boot. Sometimes the problem may be due to a third-party application interfering with the process. Therefore it will be necessary to perform a clean boot of the system, and try again. Finally, none of this works, we can make use of SLUI. We can do this by opening a run window with Win + R, where we type slui.exe 3. Then we can try to re-enter the product key to activate Windows .

Error 0xC004F078

Assuming we run into error code 0xC004F078, most likely the software licensing service reported that the key does not match a valid one. Therefore, the way to solve this problem is by following the same steps that we saw before for error 0xC004F074.

Error 0xC004F012

To give us an idea, say that this error 0xC004F012 in particular is due to the fact that some library related to licenses is not installed. It can also be the case that it is damaged for some reason. This error is quite common when we carry out a first installation of the operating system. Of course, it can also appear after some important Windows update has reached our PC.

Therefore, the best solution is usually to rebuild the Tokens.dat file. For this, we are telling you what we must do is go to the disk path C: /Windows/System32/SPP/Store/2.0. Here we rename the tokens.dat file to tokens.old and then open a CMD window with Administrator permissions. Here we just have to execute the following commands:

net start sppsvc cscript.exe slmgr.vbs /rilc

When this has run, we reboot the system then launch the Activation troubleshooter from the Settings app. To finish we reopen a CMD window with administrator permissions and execute the following:

slmgr.vbs.ipk Clave_producto slmgr.vbs/ato

Error 0xc004c003

After installing a major Windows 10 update, we may run into error code 0xc004c003. Well, this usually occurs when a component of the license code tries to access a part of the registry without proper access. In fact, Redmond’s own firm explains that the problem affects certain versions of Windows such as 2004. Thus, the resulting access denied error causes the product key to not be extracted correctly.

To solve this that we tell you, the first thing will be to update the operating system to its most current version.

Error 0x8007267C

Assuming we encounter error code 0x8007267C when activating Windows, let’s see how to fix it. To begin with, we will tell you that this error can occur if the computer you are trying to activate does not have a registered DNS server. These are the ones we add in the network properties, so this error tells us that there are no DNS servers configured for the local system.

In the same way, we can find this error if we do not have an Internet connection or the activation server is not available. To solve it we have to reconnect and try to activate the computer. If the problem is given by the DNS, we need to check the DNS Server . To do this we open a Command Prompt window with administrator permissions from. Next we write the following command:

ipconfig /all

Here we check the IP address, subnet mask, default gateway, and DNS servers. If all of this is correct, then we must try to check the IP connectivity with the DNS server. To do this we write the following command:

ping Dirección IP_del_DNS

So if the packets are not sent, we must try to solve the TCP / IP connectivity problem. We can also empty the DNS cache with this:

ipconfig /flushdns

After that we will get a confirmation message and after fixing the DNS server we retry the Windows Activation process with the following command:

cscript windowssystem32slmgr.vbs -ato

On the other hand, we can also try to disable the Windows Defender Firewall, since it may be the cause of this error. We achieve this from the Control Panel by accessing the Windows Defender Firewall where we can deactivate it.

Error 0xC004C008

Changing third, if we find the Windows 10 activation error code 0xC004C008 on the screen, let’s see the possible solutions. This problem generally occurs when we update Windows 10. Specifically, it indicates that the Windows 10 product key may have been used on several devices, so we cannot use it here.

Thus, the most probable thing in this case is that this product key has already been used on a different PC, or is being used on more than one computer. Therefore the solution here is to buy a new Windows 10 key. This is something that we can do directly from Settings / Update and security / Activation.

Error 0xc004f063

Windows 10 can be the victim of numerous errors when we try to activate it, as in the case of 0xc004f063. This error appears especially when we try to activate the Redmond operating system. It is related to the Software Licensing Service. Therefore, it could be said that this occurs when the system is missing critical system files, which prevents the user from activating the software . So, to fix the activation error code 0xc004f063, we have several methods. The first and most common is to run the activation troubleshooter as we have seen other times before. On the other hand, we can use the SLMGR command in a command prompt window. The specific commands to use here are the following:

slmgr /ipk Clave_Windows slmgr /ato

We can also try to scan the system files from a CMD window using the following commands:

Dism.exe /online /cleanup-image /scanhealth DISM.exe /Online /Cleanup-image /Restorehealth

Error 0xC004E028

Another of the activation error codes that we can find is 0xC004E028. Well, say that this generally occurs when we cut the process as such when Windows activation is still taking place. Therefore if the first activation attempt fails, the second activation will not complete and this failure will be displayed. For example this can happen if we have accidentally used an incorrect password and then try to change it during the process itself.

And it is that during it, Windows sends the key to the Microsoft servers to validate it, but if a result is not returned, we will not be able to activate Windows again. Therefore the best advice we can follow here is to be patient and wait.