There are 2 scenario where the cancel button will not behave as expected:

1st scenario:

1. Install JRE1.4.2 or J2SDK1.4.2
2. Press the cancel button at the point where the dialog box states following:
"Please wait while the installShield wizard install Java ... This may take several minutes.", "status: creating jar file..."
3. Another dialog box will ask whether the user really want to cancel the installation process, press "Yes" to cancel.

Results: Some files have been installed and the registry has been modified.

Expected behavior: The installation should have completely roll back to the previous state where no file has been install.

2nd scenario:

1. Uninstall either JRE1.4.2 or J2SDK1.4.2
2. Press the cancel button at the point where the dialog box states following:
"Status: windows configures Java 2 Realtime Environment SE v1.4.2"
3. A dialog box will have its status bar reverse and roll back.

Results: Some files have been uninstalled and some registry records would have been deleted.

Expected behavior: The uninstallation should roll back and no files or registry should be modified.