If you need the ability to use virtual desktops in Windows, you may want to check out Dexpot. You can make certain applications automatically appear on a different virtual desktop such as one for web browsing, another for email and im and so on. Dexpot creates and manages virtual desktops on Windows 95/98/ME and NT4/2000/XP/2003/Vista (incl. x64). It's Free for private use.