If you upgrade Terminal Server's installation of Internet Explorer, you may receive:
Internet Explorer Installation is Incomplete
if you first installed IE when you installed Terminal Server.
When you setup additional components, you may be told that setup did not install:
Internet Explorer Direct Animation.
Internet Explorer Classes for Java.
When you restart, you may be told that you had a JAVA installation failure.
The above problems are symptomatic of not having used Control Panel / Add/Remove Programs to perform the upgrade.
To workaround the problem, remove IE using Control Panel / Add/Remove Programs.
Download IE, or copy it from a CD-ROM, to a network share or to the local hard drive.
Use Control Panel / Add/Remove Programs to click Install / Next / Browse and locate the IE<x>setup.exe file from the previous step. Select the IE<x>setup.exe and follow the on-screen instructions to complete the install.