If you want computing environment more safer, use Ubuntu instead of Microsoft Windows. Dell said on the home page of the Ubuntu. Since 2007, Dell has indeed been shipped PCs fitted with Ubuntu.
There are 10 important points about Ubuntu described Dell, you can check it at Dell home page. Simple but elegant in sequence to 10. Designed for the Internet, and very media-centric is a two points in a row underneath.
However, the most interesting is point number six, that Ubuntu is more secure than Microsoft Windows. The reason Dell, the majority of viruses and spyware that are written by the hackers were not designed to target and attack Linux.