Non-savvy users really get lost at how screenshots work.
I have a buddy who's a programmer at publishing house, specializing in niche magazines, and they deal regularly with non-savvy older users. He's got this story about one such customer who was complaining that something wasn't working on the website and when asked to send a screenshot he proceeded to:
1) Press PrintScreen 2) Paste it into Word 3) Print it out, and finally, 4) Fax it to the company.
I thought that was kind of related, and rather humorous.