Anthropomorphism
Anthropomorphism is attributing human characteristics or behaviors to things that are not human. Often there is a temptation to use anthropomorphic language as a way to make material easier for users to understand. But you should avoid this temptation as it can create readbility and interpretation problems for your users. Often, anthropomorphic writing is the result of imprecise or incomplete understanding of the topic at hand.
There are a few instances in which arthopomorphism is unavoidable because established terminology implies its use, though in those instances the metaphor is well established and clear. For example, the use of the child/parent metaphor where an object inherits attributes, settings, etc. In this instance, attempting to avoid the anthropomorphic language would introduce further confusion.
Use your professional judgement guide you when dealing with anthropomorphic user interface (wizards, guides, etc.) in determining how much of that anthropomorphism you wish to reinforce within the documentation.
Try to avoid words or phrases that convey intention, desire, intellect, or emotion. (For instance, refuses, wants, thinks, knows, realizes, likes.)