For anyone who thinks Linux is still in the stone age, you couldn't be more wrong. If that was true, why is Microsoft training people who sell their products to bad mouth Linux? Surely if Linux was that bad, anyone who tried it would run back to the store and buy Windows. So why is Microsoft worried about losing customers? It's simple, Linux offers everything that Windows offers, but for free. It uses less resources, so it runs better. Another bonus is that you don't have to buy a Firewall, Anti-Virus, Anti-Spyware, or any Anti-Malware program, the Operating System is already secure. You don't even have to buy Microsoft Office because Linux offers free and complete alternatives to Microsoft Office. There's a free alternative program for 99% of all your Windows programs that you'd normally have to pay for.
The only downside to using Linux is that if you're a gamer, it takes a bit of work to get games running. The reason for that is Microsoft owns DirectX, so DirectX needs to be emulated on Linux. If any Windows users are interested in testing out a Linux distribution, I recommend trying Ubuntu. Wubi was recently released which allows you to install Ubuntu as if it was a Windows program, then when you restart your computer you can select which Operating System you wish to boot into. I think this is great as it makes it so much easier for newcomers to test out Linux. You can find Wubi here:
http://wubi-installer.org/
If you're new to Linux, to prevent any surprises I highly recommend reading the following article before trying Linux:
http://linux.oneandoneis2.org/LNW.htm