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Internet Explorer Schannel.dll Update
December 1999


Information on All Available updates
See the full list of affected browsers and updates.

About the Internet Explorer Schannel.dll Update
The version of Internet Explorer 5.01 that is released on the Web contains an incorrect internal key in the Schannel.dll file. This may cause programs and services on your computer that use Secure Socket Layer (SSL) or Security Support Provider Interface (SSPI) to no longer function. Installing this update will eliminate this problem by providing you with a corrected Schannel.dll file. If you have installed high (128-bit) encryption on your computer, you do not need to install this update.

For more technical details about the Schannel.dll update, see Microsoft Knowledge Base (KB) article Q247.

Whose Computer Is at Risk?
Here is a list of operating systems and updates for the English language versions only. (International language versions also may be available.)

Windows 98

Internet Explorer 5.01 and Internet Tools   Click here to download the update.

Internet Explorer 5 and Internet Tools   Not vulnerable

Internet Explorer 4.01 Service Pack 2   Not vulnerable

Internet Explorer 4.01 Service Pack 1   Not vulnerable

Internet Explorer 4.01   Not vulnerable


Windows 95

Internet Explorer 5.01 and Internet Tools   Click here to download the update.

Internet Explorer 5 and Internet Tools   Not vulnerable

Internet Explorer 4.01 Service Pack 2   Not vulnerable

Internet Explorer 4.01 Service Pack 1   Not vulnerable

Internet Explorer 4.01   Not vulnerable

Internet Explorer 4.0   Not vulnerable


Windows NT 4.0 (x86)

Internet Explorer 5.01 and Internet Tools   Click here to download the update.

Internet Explorer 5 and Internet Tools   Not vulnerable

Internet Explorer 4.01 Service Pack 2   Not vulnerable

Internet Explorer 4.01 Service Pack 1   Not vulnerable

Internet Explorer 4.01   Not vulnerable

Internet Explorer 4.0   Not vulnerable


Windows NT 4.0 (DEC Alpha)

Internet Explorer 5 and Internet Tools   Not vulnerable

Internet Explorer 4.01 Service Pack 2   Not vulnerable

Internet Explorer 4.01 Service Pack 1   Not vulnerable

Internet Explorer 4.01   Not vulnerable

Internet Explorer 4.0   Not vulnerable


Windows 3.1 and Windows NT 3.51

Internet Explorer (all versions)   Not vulnerable


Macintosh

Internet Explorer (all versions)   Not vulnerable


Unix (Solaris)

Internet Explorer (all versions)   Not vulnerable


Unix (HP-UX)

Internet Explorer (all versions)   Not vulnerable


Last updated:  Tuesday, May 30, 2000
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