The Software Licensing Service reported that the product key is not allowed to be installed. Please see the eventlog for details. If you received one of the error codes in this list, go to method F.
If the error code that you received does not appear in any of the lists here, please search the Microsoft Knowledge Base for more information. This method is rated: Moderately easy. For more information about how to resolve this error message, click the following article number to view the article in the Microsoft Knowledge Base:.
If this method did not work for you, you might want to ask someone for help, or you might want to contact Support for your next steps. Note Assisted support is no longer available for Windows Vista. This method is rated: Easy. If you were directed to this method, you entered an incorrect product key. See the product packaging to make sure that you have the correct product key. Then, follow these steps to use the "Change product key" feature and reactivate Windows:. Click Start , click Computer , and then click System properties on the toolbar.
In the Windows activation section, click the Change product key. If you are prompted for an administrator password or for confirmation, type your password, or click Continue. In the Product key box, type the product key, and then click Next.
Note Check the product packaging to make sure that you are entering the correct product key. If this method worked, you are finished. If this method did not work for you, go to method G. If you were directed to this method, you have the correct product key, but you have to try entering it again to reactivate Windows.
To do this, follow these steps:. Note Use your original product key. If you were directed to this method, your product key may not be compatible with your version of Windows. For example, if you have a bit version of Windows, and you purchased a bit upgrade of Windows, the new product key will not work with your current version of Windows. You can only upgrade a bit version of Windows to another bit version of Windows. To complete this method, follow these steps:.
Determine whether you have a bit or bit version of Windows. Click Start , type system in the Start Search box, and then click system in the Programs list. For a bit version operating system: bit Operating System appears for the System type under System. See the product packaging to determine which version of Windows the product key is intended for bit or bit. For more information about all compatible upgrade options for Windows Vista, click the following article numbers to view the articles in the Microsoft Knowledge Base:.
To obtain a compatible version, follow these steps:. Contact the software manufacturer of the antivirus software or of the DRM software to obtain a version that is compatible with Windows. For more information about this issue in Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base:.
Click Start , and then click Help and Support. In the list of topics, click Troubleshoot network and Internet connection problems. Click Start , and then click Computer. Click System properties on the toolbar, and then click Click here to activate Windows now in the Windows activation section.
Click Use the automated phone system , and then follow the instructions that are provided. For more information about the "activation period has expired" error message, click the following article number to view the article in the Microsoft Knowledge Base:.
To activate your copy of Windows Vista, you may need your valid product key. Note If Windows Vista was preinstalled by an original equipment manufacturer OEM , the product key appears on a sticker on the case of the computer.
To activate Windows Vista online, you must have an Internet connection. To activate Windows Vista by telephone, you must use the automated telephone system.
To activate Windows Vista, follow these steps:. Click Start , and then click Computer. Click System properties on the toolbar, and then click Click here to activate Windows now in the Windows activation area. If you are prompted for an administrator password or for a confirmation, type the password, or click Continue. Note If you select the automatic activation method when you first set up your computer, the automatic activation process tries to activate your copy of Windows Vista three days after you first log on.
Click System properties on the toolbar, and view the Windows Vista activation status in the Windows activation area at the bottom of the System properties box. If you are re-installing Windows or reactivating Windows, the activation process may not be completed successfully when you try to activate Windows Vista over the Internet by using the Windows Activation Wizard.
If this occurs, you should activate Windows over the telephone. To activate Windows Vista over the telephone, follow these steps:. Click Use the automated telephone system in the Windows Activation Wizard. On rare occasions, you may be prompted to activate Windows Vista on a computer that did not previously require Windows Vista activation or was already activated successfully. For example, this may occur on a computer where Windows Vista was preinstalled by an OEM or Volume Licensing installation and major hardware changes have occurred, such as upgrading the hard disk and memory at the same time.
If you are prompted to reactivate Windows Vista, you can do so by using the Windows Activation Wizard:. To prevent this problem in the future, you should obtain the latest service pack for your installed version of Windows Vista, either through automatic updates or direct download.
To update Windows Vista and prevent this Activation problem from reoccurring:. As soon as Windows Vista has found the updates, click the Install updates button. Need more help? Expand your skills. Get new features first. Was this information helpful? Yes No.
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