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This article contains a list of the fixes included in Microsoft Proxy Server 2.0 Service Pack 1. (SP1)
Windows NT 4.0 Service Pack 4 or later must be installed before installing Proxy Server 2.0 SP1. For information about obtaining the latest service pack for Windows NT 4.0 and Windows NT Server, Terminal Server Edition, please see the following article in the Microsoft Knowledge Base:
152734 How to Obtain the Latest Windows NT 4.0 Service Pack
Proxy Server 2.0 SP1 supercedes the Proxy 2.0 Combined Hotfix. It is not necessary to install the Proxy 2.0 Combined Hotfix after Proxy Server 2.0 SP1 has been applied. For more information about the Proxy 2.0 Combined Hotfix, please see the following article in the Microsoft Knowledge Base:
190997 Proxy Server 2.0 Combined Hotfix Information and List of Fixes
The articles listed below contain more information about issues that are resolved by Proxy Server 2.0 SP1. This service pack contains an uninstall feature that you can use to restore your system to its previous state. This service pack requires a reboot upon completion of installation.