Microsoft Hyper-V, Virtual Server, and Acronis True Image snapshots
It is one of the last versions to reliably support older operating systems like Windows NT SP6 , Windows 2000 SP4 , and early Linux distributions that newer versions have deprecated.
Note: Windows Server 2008 is explicitly not supported by this version. Download and Availability vmware vcenter converter 4.0.1 download
Full support for guest customization (sysprep) of Windows Server 2008. System Compatibility
Despite being a minor release, 4.0.1 introduced several substantial improvements: Microsoft Hyper-V, Virtual Server, and Acronis True Image
Support for creating and migrating virtual machines using hardware version 7.0.
RHEL 2.1–5.0, SUSE Linux Enterprise 8–10, Ubuntu 5.x–8.x Windows 2000 SP4
hosts as both source and destination targets.