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When you try to use digest proxy authentication to connect to secure (HTTPS) Web sites, Microsoft Internet Explorer 6 may unexpectedly close. This problem occurs when Internet Explorer connects to secure Web sites by using the Microsoft Windows Internet (WinINet) API together with digest proxy authentication.
This problem occurs because the Wininet.dll file incorrectly handles HTTP 407 error codes that occur during digest proxy authentication.
This problem is fixed in Windows Internet Explorer 7. To obtain Internet Explorer 7, visit the following Microsoft Web site: