Anybody dissatisfied with both Mac and PC (for instance, prefer PC's interface but prefer Mac's security) should seriously consider downloading or getting a CD copy of Ubuntu. It's built on the Unix OS and is a distribution of Linux.
With both a Windows-like taskbar at the bottom and a Mac-like consistent toolbar up the top, the open source OS is simply brilliant. Due to the Open Source philosophy, every program is free, and there's a program for everything - in fact Ubuntu comes with an instant messenger that interacts with MSN, Yahoo, ICQ, Gadu-Gadu and a whole bunch of other IM's that I've never heard of
A lot of the programs are built on Mozilla code, (obviously it comes with Firefox) , and the best part is - everything is editable. Because Ubuntu is built on the Open Source philosophy, you can alter the code of every program, or learn from it.
And I haven't even begun to discover what this OS can do
The 700mb download is free (CD copies are available - I myself still have the .iso so anyone in Wantirna College can borrow a copy if they want), just make sure you don't install it on top of Windows