As we know, many people have been installing Windows 10 for the past three days and naturally we can feel that even our Internet connections are slowing down. It was offered to Windows 10, Windows 7, Windows 8 and Windows 8.1 users free of charge. Many people continue to take advantage of this opportunity. However, you may experience an error in the activation process due to density or other reasons. I would like to mention a few of these errors below. First of all I would like to say this! To have a Windows 10 license for free, you need to have one of Windows 7 SP1, Windows 8 or Windows 8.1 operating systems. Also, the free license can be obtained by first doing UPGRADE. As we got by reserving this right, we need to upgrade our operating system to Windows 10. Otherwise, if you directly format and try to install by booting via CD, DVD or USB, you will not have a free license! You will experience activation problems. However, once we upgrade, Windows 10 automatically activates and stores your computer's license on the Microsoft Store (either by associating it with your Hotmail account or not). Afterwards, you can make a clean installation by formatting. Otherwise, if you do not upgrade your license by upgrading (i.e. installing it with your current operating system on), you cannot obtain the license. This results in the KEY asking you. Go to Start The Start button icon and then select Settings> Update & security> Activation. Select Go to Store and check if a valid license is available for your device. This only applies if you have not made a hardware change on your device. Caution hardware replacement may deactivate your license. Because hardware control is done in the licensing model. If the hardware has changed, you get a new computer treatment. Genuine Product Verification detected corrupt Windows binaries. (Error code: 0xC004C4AE) You may see this error if you used a third-party application to add a display language that is not yet supported by Windows on your computer. To fix the problem, you can restore your computer to a previous state and undo changes made on Windows. Or you need to try Windows 10 recovery options. If this does not solve the problem, your copy of Windows may not be valid and you need to purchase a new copy. The Software Licensing Service has determined that this specified product key can only be used for upgrading and not for clean installations. (Error code: 0xC004F061) Before using a product key to upgrade to the Windows 10 operating system, you may see this error if your computer has no previous version of Windows installed. To upgrade, you must have Windows 8 or Windows 7 installed on your computer. First you have to upgrade. A network problem occurred while activating your copy of Windows. (Error code: 0xC004FC03) You might see this error if you're not connected to the Internet or if your firewall settings are preventing Windows from completing the activation process online. Make sure you are connected to the Internet and your firewall is not blocking the activation process of Windows. If you're still having trouble, you can try to activate Windows via the phone. The activation server reported that the product key lock has exceeded its opening limit. (Error code 0xC004C008) You may see this error if the product key has already been used on another computer or if it is used on more computers than the Microsoft Software License Terms allow. To fix the problem, you need to purchase a product key for each computer where you want to activate Microsoft. This product key could not be used. (Error code-: 0xC004C003) You may also get this error if you are using an invalid product key. You need to get a new product key. If you bought a computer with a preinstalled version of Windows, contact the computer manufacturer to ask for the original key. The activation server reported that the Multiple Activation Key has exceeded the limit. (Error code: 0xC004C020) This error occurs when using a Volume License (license purchased by Microsoft for installing Windows on more than one computer) on more computers than the Microsoft Software License Terms allow. To fix the problem, you may need to activate your computer using a different product key. DNS name does not exist. (Error code: 0x8007232B) The filename, directory name, or volume label syntax is incorrect. (Error code: 0x8007007B) You may see this error if you are not connected to your workplace network while trying to activate the computer at your workplace. If you see this error even though you are connected to your business network, you may need to change your network settings. Go to Start The Start button icon and then select Settings> Update & security> Activation. Select Change product key, and then enter your 25-character product key. You may be asked to enter an administrator password or confirm your choice. A security error has occurred. (Error code: 0x80072F8F) You may see this error if the computer's date and time are incorrect or Windows is having trouble connecting to the online activation service and cannot verify your product key. Select Start Start button icon Settings> Time and language> Date and time. Make sure the date and time are correct on your computer. The Software Licensing Service reported that the license evaluation failed. (Error code: 0xC004E003) You may see this error after installing third-party software that replaces system files.. Certain system files are required to complete Windows activation. You can try to restore your computer's system files to a previous state. Doing so allows you to remove software you installed after that date without affecting your personal files. Unspecified error. (Error code: 0x80004005) If you see this error, go to the Start button icon and select Settings> Update & security> Activation, and then try to activate Windows manually by selecting Activate Windows. If this doesn't work, you might need to reset your computer.