Microsoft Windows Home Server 2011 OEM - 64-bit (10 CALs) [Old Version] System Requirements: Processor: 1.4 GHz (x86-64 processor), Memory: 2 GB RAM, Hard Disk Space: 160 GB Quickly set up networks, user accounts, devices and storage Add any computer to your network: Windows 7, Vista, XP, Mac or Linux Efficiently share folders, files and digital media Remotely access your content from any Internet-connected computer safely and securely