Microsoft KB Archive/166465

= Internet Explorer Does Not Start =

Article ID: 166465

Article Last Modified on 6/5/2007

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APPLIES TO


 * Microsoft Internet Explorer 2.0
 * Microsoft Internet Explorer 3.0
 * Microsoft Internet Explorer 3.01
 * Microsoft Internet Explorer 3.02
 * Microsoft Internet Explorer 4.0 128-Bit Edition
 * Microsoft Internet Explorer 4.01 128-Bit Edition
 * Microsoft Internet Explorer 5.0
 * Microsoft Internet Explorer 5.01
 * Microsoft Internet Explorer 5.5

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This article was previously published under Q166465



SYMPTOMS
When you attempt to start Internet Explorer, the mouse pointer may change to the Working In Background or Busy pointer and then back to the normal pointer, but Internet Explorer may not start.



CAUSE
The EnforceShellExtensionSecurity registry option has been set and Internet Explorer does not register itself as an approved shell extension in the registry.



RESOLUTION
To resolve this issue, create a file named Enabie3.reg that contains the following four lines: REGEDIT4

[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved] "{5E6AB780-7743-11CF-A12B-00AA004AE837}"="Microsoft Internet Toolbar" "{3DC7A020-0ACD-11CF-A9BB-00AA004AE837}"="The Internet" After you create and save this file, double-click it in Windows NT Explorer. A message will appear stating that the information in the Enabie3.reg file has been entered into the registry.



STATUS
Microsoft is researching this problem and will post new information here in the Microsoft Knowledge Base as it becomes available.



MORE INFORMATION
To restrict which shell extensions can be run on a Windows NT server or workstation, you can add "EnforceShellExtensionSecurity=0x1" to the following registry key using a policy or Registry Editor:

HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer

However, Internet Explorer does not resister itself in the following key

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Shell Extensions\Approved

and as a result is unable to run.

Additional query words: 4.00 3.00

Keywords: kbenv KB166465

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