When you go to Control Panel-Add Remove windows component and select Microsoft Services for NFS to install, you will see the size as 0.0 MB. The actual size for this component is 3.9 mb. This is just an issue on certain builds of Windows XP, Windows 2003/R2 and is caused due to incorrect entries in layout.inf. So far Windows 2008 seems to be void of this issue. Windows component wizard uses the file size entry in layout.inf to dynamically calculate the required space for each component. This issue is just about size not being updated/ calculated properly. The component will be installed properly; we have tested the same on multiple systems. There should not be any functional impact for any of the NFS components.