Minimum requirement for installing Alfred Desktop are:
OS: Win 7 SP1 or higher
.NET Framework 4.5
90 Mb of available disk space: initial installation and first server
For Outlook 2003 integration: PIA 2003 - Primary Interop Assemblies
For Edit Online: MS Office 2011 or higher
Convert to PDF: MS Office 2007 or higher
Compare documents: MS WORD 2007 or higher
Metadata auto completion: requires SOLR-based search on the Alfresco server
Facetted search: requires SOLR-based search on the Alfresco server