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How to Fix Windows 7 Activation Error-“Invalid Key”

You may come across an error showing “invalid product key” even while you are using an authenticated software. This error or problem can be solved by the following ways.

The main purpose of using a product key is to activate or register software. It can be done online or offline. Windows 7 is a program which requires online registration. The advantage of online registration is that no product key is used twice.

Before finding out a solution to the problem, it is important to know about the reasons which may cause such an error. The first and the foremost reason are mistyping the product key. It is possible to mistype a very long string of letters and characters correctly. This can be corrected manually by retyping the correct key.

The second possible cause may be using a product key of a different version. So it is important that you should ensure that the product key and the version you are trying to activate are the same. For example when you are trying to upgrade the previous version of Windows using Windows 7, it is important that your system should have a copy of the older version. It is known that when you format the disk before installing Windows 7, it removes the older versions from your computer. And now if you use the product key for the upgrade version of Window 7, then you will be shown an invalid product key error.

You can also format your hard drive while installation through custom mode. Here you will be shown special settings to format. You can check your computer or the Windows package to ensure that you are provided with the right product key for the right version. It is also possible to download Windows 7 installation file online. For this you must get the product key from the Microsoft through a confirmatory mail. The confirmatory mail is to ensure that you are the person who has purchased and is using the product.

The next reason may be that you are using a version that is not genuine. In such cases, the product key won’t allow for activation of the version and will show error. To avoid this use always a genuine product.

At times all these measures fail. Then you are left with no other option but to buy another copy of the Windows 7. The new copy will carry a new product key that can be used to activate the current version in your computer. You should ensure that you are buying the same version that you have in your computer. But at times it takes a little time before you get a new copy. In this case you can leave the product key empty and click next.

Now your Windows is inactivated but it is completely usable. This is because the Windows provide you with a trial period of 30 days. You can enter the correct product key within the 30 days which is offered as trial.

How to Resolve Windows 7 Activation Error 0xC004F061

The 0xc004f061 error message occurs when you try to use a license key to activate a newly installed Windows 7 as an upgrade version of your previous operating system; but you do not have the previous version of Windows in your computer. Microsoft keeps an option for its current users of Windows XP and Vista, or even Windows 7, to upgrade them into the latest version of Windows 7. The installation is easy and the product key is different from a new set up. However, to use the key, you have to keep the previous version of your operating system and the new installation will be placed over the older version. If you do not follow this, you will get this error massage.

If you format the hard drive before installing the upgrade version, the product key will not work and will require the previous version of your Windows. In that case, you have to reinstall the previous Windows OS (Operating System) and then again reinstall the upgraded version of Windows 7 and then use the product key. So the best way to prevent the error message is to install the upgraded version over your existing OS.

If you are sure that you have done everything right, but still get the error message, you can check for some mistakes before you start the new installation process. You can take care of the following points before you do that:

Right serial number

See if you type the right serial number. The product key is a combination of letters and numbers and there is a good chance that you may have made a mistake in the typing. So recheck them carefully. Also make sure that you get the original number. There will be a sticker as a Certificate of Authenticity in the original product.

Serial Number for Windows 7

Make sure that you use the serial number for the right version of the Windows 7. Currently Windows 7 comes in four versions: Starter, Home Premium, Professional and Ultimate. See if you have used the wrong key for wrong version.

License Key version

You need to find out whether your license key is for full version of Windows 7 or for upgraded version because they are different for each and one will not work on another.

If none of these help you, you have to reinstall the OS. Before starting, make sure that you have a valid serial number and a right copy of Windows 7 and your previous version of Windows OS. Format a drive in your hard disk and install the older version of Windows, then the upgraded version of Windows 7 and use the valid key. That should solve your problem.

If you still have the problem, you should contact the Support center of Microsoft. To obtain a temporary solution, you can clear the serial number box in the window that asks for the number and continue the installing process. That will install the OS in your computer with 30 days validation. You can use the computer during that time and meanwhile contact Microsoft for a solution.

How to Resolve Activation Error “0xC004F074” in Windows 7

When you try to activate your client machines having the operating system of Windows 7 or Windows Server 2008 R2 key management system you might sometimes get the error message of 0xC004F074 having the description that the key management system is unavailable. In some of the client machines this problem has been observed and the people have to face some difficulties. There are some reasons for this issue.


This kind of problem happens due to the mismatch of the support version which occurs between the client key management system and the host machine of the key management system. The host KMS is used actually as a Windows server 2008 host which is not able to activate the machines that have the Windows 7 or the Server 2008 R2. In the most common cases it has been seen that when the host KMS is running on the operating systems of Windows server 2003 or on windows server 2008 then this error message is usually seen and the client of the KMS is the Windows 7 or the Windows server 2008 R2. You would need to have an update in order to bring the host KMS running on the Windows server 2003 operating system. One update is also required for the host KMS to run on the Windows server 2008 operating system so that it should be able to activate the client KMS which are present on the Windows 7 or the Windows server 2008 R2 machines.

Resolution to this error message

When you are experiencing this type of error message then you can follow certain steps or methods to get rid of this. With the help of these methods you would be able to avoid this error message of the key management system being unavailable.

For windows server 2003

When your system is having the operating system of Windows server 2003 as the host of your Key management system then you would need to have the update. The update can be easily obtained from the support web site of Microsoft and you can easily install the KMS i.e. the Key management system version number 1.2 for the Windows server 2003 service pack 1 and also for the later versions of the operating system of Windows server 2003.

For Windows server 2008

When you need to have the update for the Windows server 2008 operating system you can contact the support from Microsoft and can easily find the solution to this problem from there. You would be able to find it in the Microsoft knowledge base. The update is also available for the Windows vista and also for the Windows server 2008 in order to extend the activation of the KMS support for the Windows 7 as well as for the Windows server 20098 R2.

This problem is seen in different versions of the Windows 7 operating system. For example in Windows 7 Enterprise, Windows 7 Enterprise N, Windows 7 Professional, Windows 7 Professional N, Windows 7 Ultimate and also in Windows 7 Ultimate N.

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Call Now: +1 833-522-1003
Call Now: +1 833-522-1003