Sadow Defender 的官網有寫..所以它支援win7-64bit
System Requirements
Operating System: Windows 2000 /XP /2003 /Vista/Windows 7
Memory by OS: 2000: 128MB, XP: 256MB, 2003: 256MB, Vista: 512MB, Windows 7: 1GB
Hard Disk: 3 MB for program files, 10MB or more free space for each partiton in Shadow Mode