VMware Workstation is powerful virtualization software for software developers/testers and enterprise IT professionals that runs multiple operating systems simultaneously on a single PC. Users can run Windows, Linux, NetWare, or Solaris x86 in fully networked, portable virtual machines - no rebooting or hard drive partitioning required. VMware Workstation delivers excellent performance and advanced features such as memory optimization and the ability to manage multi-tier configurations and multiple snapshots. With millions of customers and dozens of major product awards over the last six years, VMware Workstation is a proven technology that improves productivity and flexibility. An indispensable tool for software developers and IT professionals worldwide. To use the versions below, you will need a valid serial number.  To obtain your serial number, please follow these steps: Evaluate or purchase VMware Workstation and you will receive your serial number(s). We recommend that you register your serial number(s). Updates for VMware Workstation 5 can be found on the Workstation Archive