Now Windows-users do no longer have to install Groovy by hand, starting today Grooy versions will also be released as Windows-Installer versions for (hopefully) all Windows version starting with Windows 95 to current Windows versions.
The installer takes care of the gory details of a Windows installation, copying groovy files, setting environment variables and file associations, and copying the native launcher to the correct directory, if the user wants this.
Details of the Windows-Installer including screen shots can be found following this link.