Updated: July 14, 2020 (May 21, 2007)

  Charts & Illustrations

Desktop OS Virtualization Licensing

Desktop OS licensing normally requires one OS license for each operating environment, whether it is the host OS or a guest OS. However, when customers have Software Assurance (SA) on the Windows desktop OS, they are eligible for additional virtualization rights, with one virtual machine (VM) permitted on Windows XP and up to four on Vista Enterprise or Ultimate. Microsoft desktop applications are not covered in this table, but as long as one application license is assigned to a device, any number of instances of that application or previous versions of the application can run on the device with no further licenses required.

Desktop OS Edition License per VM License per VM with Software Assurance
Windows XP Pro 1 0, 1 VM permitted
Vista Home Basic, Premium Not permitted NA
Vista Business 1 0, up to 4 installed VMs*
Vista Enterprise 1 0, up to 4 installed VMs
Vista Ultimate 1 0, up to 4 installed VMs

Atlas Members have full access

Get access to this and thousands of other unbiased analyses, roadmaps, decision kits, infographics, reference guides, and more, all included with membership. Comprehensive access to the most in-depth and unbiased expertise for Microsoft enterprise decision-making is waiting.

Membership Options

Already have an account? Login Now