Article ID: 931954 - View products that this article applies to.
After you upgrade from Microsoft Windows XP to Windows Vista, multiple windows open when you start Windows Internet Explorer 7. Or, multiple windows open when you visit certain Web sites in Internet Explorer 7. You may experience this issue when you start Internet Explorer 7 for the first time.
This issue may occur if Internet Explorer was configured to include a trusted Web site in Windows XP. When you upgrade to Windows Vista, Internet Explorer 7 inherits the list of trusted Web sites from Windows XP.
In Internet Explorer 7, trusted Web sites and Web sites that are not trusted do not appear in the same window. By default, protected mode is disabled for Web sites that are registered as trusted Web sites. Protected mode is enabled for Web sites that are not registered as trusted Web sites.
When Internet Explorer 7 starts for the first time, it is redirected from a Microsoft Web site to the http://runonce.msn.com/runonce2.aspx Web site. This Web site is used to set various configuration settings. If you register "*.microsoft.com" as a trusted Web site, Internet Explorer 7 starts with protected mode disabled to access the Microsoft Web site. Then, Internet Explorer 7 redirects you to the home page that is set in the preferences. However, if the home page is not a trusted Web site, protected mode is enabled. Therefore, a new Internet Explorer 7 window opens.
To resolve this issue, remove all Web sites from the list of trusted Web sites before you upgrade to Windows Vista. After you upgrade to Windows Vista, you can restore the Web sites to the list. To remove a Web site from the list of trusted Web sites, follow these steps:
You may experience this issue in the following situations:
931225For more information about how to upgrade from Microsoft Windows XP to Windows Vista by using the upgrade version of Windows Vista, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/931225/ )How to prepare to upgrade from Windows XP to Windows Vista
(http://support.microsoft.com/kb/931226/ )How to upgrade from Windows XP to Windows Vista by using the upgrade version of Windows Vista