Make sure you are not trying to save to the hard disk of the computer which on a lab machine will be locked. On a Mac the application is probably already open without an open document. Note that a PC can start the same program twice or more. Quit the application. Then open the application up again.
Letters appearing on the screen are different to the keyboard keys.
This is usually because in the control panels the keyboard is set to a foreign keyboard. Reset it to US or Australian if available. Inappropriate control panel settings on a Mac can be cured by resetting the Parameter Ram but consult the Help Desk before attempting this On a PC if you wish to remove software you must uninstal it - not simply delete it from the directory, otherwise the computer will give an error on restart saying it can't find files. The cure is to reinstal the program and then uninstal it. You are directed to a disclaimer and copyright notice Please send any comments or questions to the Help Desk, IT Services.