Service Pack 6 for Terminal Server (TSE SP6) provides the latest updates to Windows NT® 4.0 Server, Terminal Server Edition. TSE SP6 is based on Service Pack 6 for Windows NT 4.0 Server, and contains additional updates for Terminal Server. It is not a required upgrade; Microsoft recommends that each customer consult the SP6 documentation to determine whether to deploy it.
This release is only available in High Encryption (128-bit) for Intel (x86) platforms.
IMPORTANT If your terminal server is running the standard encryption (40-bit) version of Windows NT 4.0, Terminal Server Edition, and your Remote Desktop Protocol (RDP) encryption level is set to "high", your client computers might be unable to connect after you apply TSE SP6. To correct this, first apply TSE SP6 on your server, and then upgrade your client computers using the Terminal Server Client Creator tool. Alternatively, you can lower your RDP encryption level to low or medium settings. This does not apply to Citrix ICA (Intelligent Console Architecture) clients.
NOTE Windows NT 4.0 Server, Terminal Server Edition Service Pack 6 is eligible for export from the U.S. to all customers worldwide, except to U.S. embargoed destinations. Information on exporting Microsoft products is available at www.microsoft.com/exporting/. Other countries may exercise separate jurisdiction over the import, export, or use of encryption products. Users who download this product should observe any local regulations that may apply to the distribution or use of encryption products.
Note If you install any programs or services that require TSE SP6 or have updates contained in TSE SP6, uninstalling TSE SP6 could adversely affect those programs.
To uninstall TSE SP6, the drive letter for the hard disk must be the same one used when you installed TSE SP6. If you change the drive letter for the hard disk, you cannot uninstall TSE SP6.
If you uninstall TSE SP6 on a computer that previously had TSE SP4 (without Internet Explorer 4.0) installed on it, cryptography will not work correctly after the uninstall completes. To work around this issue, reinstall TSE SP4 after you have uninstalled TSE SP6.
Uninstalling TSE SP6 will not uninstall new versions of CryptoAPI and SChannel.
Important If you plan to install a previous Service Pack after uninstalling TSE SP6, note that TSE SP6 modifies the Security Account Manager (SAM) database and the Security database so that older versions of the Samsrv.dll, Samlib.dll, Lsasrv.dll, Services.exe, Msv1_0.dll, and Winlogon.exe files no longer recognize the database structure. Therefore, the uninstall process does not restore these files when uninstalling TSE SP6. If you install a prior Service Pack (for example, TSE SP3) after uninstalling TSE SP6, when the Confirm File Replace dialog boxes appear, click No to avoid overwriting Samsrv.dll and Winlogon.exe. If you overwrite the newer files with these older versions, you'll be unable to log on to the computer.
If you are reinstalling TSE SP6 after installing new software or hardware, you must create a new Uninstall folder. To retain your ability to return to a startup configuration , copy the current Uninstall folder to a safe location before running the TSE SP6 installation program.