Microsoft has altered the EULA (End User License Agreement) for the Home Basic and Home Premium varieties of its Windows Vista operating system. Previously, it was technically possible, but illegal, to run either version of Vista in a virtual machine with software such as VMware Fusion or Parallels Desktop for Mac, much to the aggravation of Mac users who need, however reluctantly, to run Windows. Microsoft has relented, and users of the Home Basic and Home Premium versions of Windows Vista will no longer b in violation of the agreement.