*Unsafe* as in your non-computer super-literate parents...

I have few friends that aren't really computer savvy and need often computer check or they even infect themselves with whatever... Bad-ware in general...

I'm not really keen on reinstalling their machines once a year or so that's why I started considering Ubuntu for them.

My relative is the next in line to get a complete reinstall. She needs this:

* Internet - I would install FF or Chrome
* Skype - I see there's a version for Linux as well
* Office like software - OpenOffice being best alternative
* Printer/Scanner support - this is the one I'm not really sure about... Canon MP520 anyone? Will I be able to make it work?

**What is your opinion on this?** Do you think that Ubuntu is mature enough for everyday users to use? I suppose they will be a bit more safe since there's much less badware around for Linux as it is for Windows.

Let's make it less argumentative
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If you have any experience in installing Ubuntu on everyday users' computers what would you suggest I should be careful about, take care about or install/remove/set? Basically I'd like to get **best guidelines on installing Ubuntu on everyday users' machine**.