There are three types of Personal Computers (PCs):
1. The Windows machine which tends to crash when it is the absolutely worst time to crash, but is a great machine for the PC gamer.
2. The Apple computer comes in many varieties but is invariably the best for multimedia and graphics. While there are not very many good programs available for the Macintosh, those that are created are good. (Usually). An Apple running MacOS X is likely to be safe from most viruses, but isn't easily interchangable with other PCs.
3. The Linux box is perhaps the most secure machine on Earth and very cheap. Support and documentation is often very good. However, it is not for the faint of heart, as it requires hard work to set up and skill. It's open source, so most stuff is free, but many of the programs are amateurish.