You may not Windows? Neither do I. The latest version -7 - is vulnerable and inferior the elegant lightness of Mac OS. Sometimes - just sometimes you need it just yet. Be it because someone has made a website for Internet Explorer to read - so by definition wrong, or a special program will be released only for Windows. Here comes Parallels for Mac into play: installing on the Mac (one minute) Windows install (40 minutes) - Windows hotfixes Download (may take) - remember antivirus! And then install the Windows program. It now has the ability to run Windows in a window or insert in several ways in the Mac OS. You can call the Windows program like a Mac program, exchange data between the platforms and almost forget that you're working with Windows. Since Windows under Parallels is just a program, it can stop and start again with virtually no waiting time at any time. Windows windows are simply beside Macfenstern on the screen and you're working with both systems without switching -eben parallel. For me, the best way to perform Windows (has shut down with me 2 Windows computer) With old versions of Windows (XP) which is also excellent, with Linux it works well - I have not tried.