I have a livecd 6.3 and book 6.3. the computer I am installing it on is somewhat old, and thus 1 SBU = about one hour. I can't figure out how to shut down the machine without losing everything i was working on. I do not know if this was covered in the book; i don't think it was. if i am wrong, say so and i will go back to reading the book. please help.