Install 6u4.. Setup update to 6u5..
Perform manual update from Control-Panel
iftw-exe is downloaded in background..
Then iftw-exe downloads msi in background..
During this time a java-cup tray-icon shows "Downloading Files."
Right click on this and click on "Cancel"
The tray-icon dissapears, but iftw-exe continues to run..

Once the user cancels download, it must stop downloading and close iftw-exe