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FIX: Only One Browser Helper Object Will Load with Internet Explorer 5

Article ID: 229970 - View products that this article applies to.

This article was previously published under Q229970

SYMPTOMS

Only a single Browser Helper Object (BHO) registered will load with Internet Explorer 5.0. Subsequent loads of other registered BHOs fail without apparent error.

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CAUSE

With Internet Explorer 4.x, multiple BHOs can be registered under the following key, and all of them will load when you start Internet Explorer:

HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Explorer\Browser Helper Objects

Under Internet Explorer 5.0, multiple BHOs can be registered, but only a single one will be loaded, because of an internal buffer problem.

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RESOLUTION

There is no supported workaround at this time.

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STATUS

Microsoft has confirmed that this is a bug in the Microsoft products that are listed at the beginning of this article. This problem was corrected in Microsoft Internet Explorer version 5.01.

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Internet Explorer uses RegEnumKeyEx to enumerate through the BHOs registered under the key mentioned above. Only the first BHO returned during this enumeration will be loaded.

Depending on whether the operating system is Windows 95 and Windows 98 or Windows NT, the BHO that is loaded may be different. On Windows NT, the BHO with the lowest CLSID will be loaded. On Windows 95 and Windows 98, the BHO that was the first registered will be loaded.

Steps to Reproduce Behavior

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Properties

Article ID: 229970 - Last Review: October 16, 2002 - Revision: 1.0

APPLIES TO

Microsoft Internet Explorer 5.0

kbbug kbfaq kbfix kbie501fix KB229970

Retired KB Content Disclaimer

This article was written about products for which Microsoft no longer offers support. Therefore, this article is offered "as is" and will no longer be updated.

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