If you want to prevent ready access to the UnInstall Icon then just delete it. You can still completely remove All files installed by SETUP by using Windows' 'Add/Remove Program' facility located in the 'Settings' + 'Control Panel' folder.
Access to the Help files is available from within the program, in fact context sensitive help is available by using the F1 key, so this Icon may also be deleted.
We think it's best that School PC's are 'uncluttered' so it is suggested that all unnecessary icons/groups be deleted, however it is prudent to leave one to start the program!