Windows activation or validation fails when you try to activate one of the following Windows operating systems over the Internet:
Windows Server 2008 R2
Windows Server 2012
Windows Server 2008 R2
Windows Server 2008
Additionally, you may experience one or more of the following symptoms:
The activation failure generates error code 0x8004FE33.
The following error events are recorded in the Application log:
Log Name: Application Source: Software Licensing Service Event ID: 8198 Level: Error Description: License Activation (SLUI.exe) failed with the following error code: 0x80004005 Log Name: Application Source: Software Licensing Service Event ID: 1008 Level: Error Description: Acquisition of Secure Processor Certificate failed. Status Code=hr=0x8004FE33
The activation failure does not prompt you for credentials.
These problems may occur when you connect to the Internet through a proxy server on which Basic authentication is enabled.
If the proxy server is configured for Basic authentication, the server requires that you type a username and a password. However, the activation user interface does not let you enter these credentials. Therefore, the Basic authentication fails, and activation fails.
Activate Windows by telephone
Use the Windows Activation Wizard to activate Windows through the automated telephone system. To do this, follow these steps for your version of the operating system.
For Windows Vista and Windows 7
Click Start, and then click Run.
Type SLUI 04, and then click OK to open the wizard.
For Windows 8 and later versions
Swipe in from the right edge of the screen, and then tap Search. Or, if you are using a mouse, point to the lower-right corner of the screen, and then click Search.
Type SLUI 04, and then tap or click the displayed icon to open the wizard.
These methods are intended for advanced computer users. If you are not comfortable with advanced troubleshooting, you might want to ask someone for help or contact Microsoft Support. For information about how to contact Support, visit the following Microsoft website:
Method 1: Configure the proxy server to disable Basic authentication
Configure the proxy server to disable Basic authentication. For information about how to use this method, see the documentation that is included with the proxy software.
Method 2: Configure the proxy server to exclude URLs for certificate revocation lists
Configure the proxy server to exclude the URLs for the certificate revocation lists (CRLs) from the requirements for Basic authentication. To do this, configure the following list of CRLs to be unauthenticated on the proxy server: