Parallels Desktop for Mac is the first solution for Intel-Macs that gives you the flexibility of running Windows on a Mac simultaneously without rebooting. It is fast and flexible by enabling you to run critical Windows-only applications like Internet Explorer, Outlook, Project, Access and Quicken at full speed. Because Windows is completely isolated from your OS X, there is no chance of infecting your Mac with Windows viruses. What is more, running Windows through Parallels is more secure now than running it on a real PC.