2 of 10Image
2. It's not Windows
Many new users aren't really aware of a difference between Windows, Linux and Mac. But what they do need to know is that they shouldn't invariably expect Windows-like behaviour. That expectation almost always leads to trouble. Of course, you don't need to explain every difference between the operating systems, but you do need to prepare them for any unfamiliar machine behaviour that you think they are likely to encounter.
Image credit: Dong Ngo/CNET News