Text copied from the install repo instance of this bug :

Windows 7 adds a new compatibility manifest section.
http://msdn.microsoft.com/en-us/library/dd371711%28VS.85%29.aspx
We should review what is there and when ready add a section
indicating we support Vista & Windows7 as per the MS example :

<?xml version="1.0" encoding="UTF-8" standalone="yes"?>
  <assembly xmlns="urn:schemas-microsoft-com:asm.v1" manifestVersion="1.0">
    <compatibility xmlns="urn:schemas-microsoft-com:compatibility.v1">
      <application>
        <supportedOS Id="{35138b9a-5d96-4fbd-8e2d-a2440225f93a}"/
        <supportedOS Id="{e2011457-1546-43c5-a5fe-008deee3d3f0}"/>
      </application>
    </compatibility>

We should update src/windows/resource/java.manifest with this.