One of the things we spend a lot of time cleaning off computers is spyware. It's as big a problem as viruses and maybe bigger--especially for people who never met a banner ad they didn't like.

Via The Shifted Librarian, here's a link to a presentation by Aaron (whose last name I don't know because I can't find a place on his site where he tells me) on What You don't know Will Hurt You: Spyware and Computers in Public Libraries (oh, wait, now I see that his last name is Schmidt because he does tell me that in his PowerPoint presentation). The presentation is geared toward libraries but contains important stuff that's good for all.

Along with all the good advice that Aaron provides in his presentation, my best advice is Pay Attention and Read Before You Click.