Originally Posted by Churminess
1. That should be fine, I know of a few people who have triple boot systems, they work just fine.
2. Ubuntu is pretty darn safe, it's pretty secure due to people just not bothering to make viruses for it due to it's smaller user base. (than things like Windows)
3. Not sure, but I haven't been using any since I started running it 6+ months ago
4. Two things you can do here, there's either Wine or an equivalent to try and install Yahoo messenger itself, or you can find an alternative in the software center, like Pidgin.
5. That can vary. It's possible to install games through Wine, but the degree to which they work is often not that great. You're best sticking to Windows for gaming.
OP: I just want you to know there is a sticky at the top of this section that can help you choose a distro if you're not entirely sure what you want. There is more to Linux than just Ubuntu. Hell, there are variants of it with other DEs.
2) Linux is not safer because it has such a smaller user base. Anyone who says that is an idiot. If that was the case then we wouldn't have servers would we because guess what? They don't all run windows. Linux is safer by design not because of user size. It's covered everywhere and a simple google search would give you the answer to that.
The problem is the same as anywhere else; getting hacked. Not viruses or other wise. The problem is entirely with the user and whether they are intelligent. I'm pretty sure though, that getting hacked in Linux (into your computer not internet accounts) is more difficult than in Windows and especially in Mac.
3) It's called iptables I believe. There's plenty of information on firewalling and filtering.
4) Empathy is fine but it's only for Gnome based distros (iirc). Pidgin is the best I've found so far. Handles everything but Skype (which you can use on its own) well.
5) Crysis should work like other games through the use of WINE but it will take more effort than simply clicking an exe so they better be ready to deal with that. Plus you'll likely have to use the Nvidia drivers from their site for Linux. They shouldn't be difficult to setup but that's still something else to be aware of.