Trivial Barriers to Personal Linux Use?

saintp asks: "I'm currently multitasking: building a computer for my girlfriend, and also trying to convince her to put Linux on it, so I've been thinking a lot lately about the barriers to adoption of Linux by Normal Everyday People. One that seems to be a major problem is that Windows users are addicted to downloading every piece of crapware that comes down the tubes -- hence the popularity of Gator and subsequent popularity of Ad-Aware. While geeks the world over sigh at this behavior, it makes a lot of people really happy, and they are very chagrined to discover that they can't do this on Linux without some command line mucking about, compilation, etc. What other minor, apparently trivial barriers exist to personal Linux use? Is anything being done to address these, or do many of the major vendors seem to be focusing exclusively on the business market, possibly to the detriment of Linux in the long run?"