Microsoft KB Archive/249135
Article ID: 249135
Article Last Modified on 11/1/2006
- Microsoft Windows NT Server 4.0 Standard Edition
- Microsoft Windows NT Workstation 4.0 Developer Edition
- Microsoft Windows NT Server 4.0 Enterprise Edition
This article was previously published under Q249135
You cannot apply the 56-bit (standard encryption) version of Service Pack 6 or 6a to a version of Windows NT 4.0 that is running a 128-bit (high encryption) version of a service pack.
If you attempt to apply the 56-bit (standard encryption) version of Service Pack 6 or 6a to a version of Windows NT 4.0 that is running a 128-bit (high encryption) version of a service pack, you receive the following error message:
In earlier service packs, installing a lower-encryption service pack generates an error message stating that you are about to downgrade the level of security, but you can install standard encryption over high encryption. In Service Pack 6/6a, you cannot do so.
For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
250867 Cannot Install Service Pack 6/6a with High Encryption Internet Explorer
Keywords: kberrmsg kbinfo KB249135