Windows
Hardware: 1 GHZ+ CPU, 1GB RAM, 250MB free drive space
Software: Windows 7, 8, 8.1 (in desktop mode) and 10, Windows Server 2008/2012, Java JRE1.7.0_45 (packaged with CrashPlan app)
OS X
Hardware: 1 GHZ+ 64-bit Intel CPU, 1GB RAM, 250MB free drive space
Software: OS 10.11, Java JRE 1.7.0_45 (packaged with CrashPlan app) Linux
Linux
Hardware: 1GHZ+ x86-64 CPU, 1GB RAM, 250MB free drive space
Software: Kernel version 2.6.13 or newer, glibc 2.4+, cpio, Xorg (requires GUI), GTK2, SysVlnit, SWT (packaged with CrashPlan app, Java JRE 1.7.0_45 (packaged with CrashPlan app)