- You are not running a release-to-manufacturing (RTM) (non-beta) version of Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000, Windows XP, or Windows Server 2003, or you are running Windows 2000 Datacenter Server.
- You are not running an RTM version of Microsoft Internet Explorer 5 or later. For example, you are running a beta version of Internet Explorer, or you are not running Internet Explorer.
- Windows Update incorrectly detects that you are not running a released version of Internet Explorer 5 or later on a supported Windows operating system. This may occur if you access the Internet through a firewall or proxy that does not allow the Windows Update Web site to receive the correct HTTP user-agent request header ("HTTP_USER_AGENT") for Internet Explorer. Windows Update uses the operating system information that the navigator.userAgent property returns to determine if you are running a supported operating system. Some firewalls or proxy servers may send user-agent information that is incorrect or difficult to interpret.
Method 1: Upgrade Windows or Internet ExplorerIf you are not running an RTM version of Windows 98, Windows 98 Second Edition, Windows Millennium Edition, Windows NT 4.0, Windows 2000 (except Datacenter Server), Windows XP, or Windows Server 2003, or you are running a beta version of Internet Explorer or a version of Internet Explorer earlier than version 5, then upgrade to the latest released version of Windows and Internet Explorer. For more information about how to determine which version of Internet Explorer you are running and how to upgrade it, click the following article number to view the article in the Microsoft Knowledge Base:
Method 2: Use Internet Explorer 5 or later or the Microsoft Download CenterIf you are using a non-Microsoft browser, you can instead either use Internet Explorer 5 or later to access the Windows Update site or download updates from the Microsoft Download Center by using your non-Microsoft browser:
Method 3: Configure your firewall or proxy to allow Windows Update to receive the Internet Explorer user-agent request headerConfigure your firewall or proxy to allow Windows Update to receive the HTTP user-agent request header that Internet Explorer sends. Contact your network or system administrator or see the documentation included with your proxy or firewall for information about how to do this.
For information about your hardware manufacturer, visit the following Web site:
Method 4: Modify the registryImportant This section, method, or task contains steps that tell you how to modify the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
Back up and then delete the following registry key:
- Click Start, and then click Run.
- In the Open box, type regedit, and then click OK.
- Locate, and then click the following registry key:HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Internet Settings\User Agent\Post Platform
- On the File menu, click Export.
- In the File name box, type Post Platform, and then click Save.
- On the Edit menu, click Delete.
- Click Yes when you are prompted to confirm the deletion.
- Quit Registry Editor.
- If this does not resolve the problem, double-click the Post Platform.reg file that you saved in step 5 to import this key back into the registry.
ID do Artigo: 817144 - Última Revisão: 25 de jun de 2009 - Revisão: 1