Microsoft
Windows
OSProcessorDisk SpaceRAMDVD-Rom
CD-Rom
Web Access
Windows 7 32/64 bits(*) 400 MHz  (700 MHz recommended or more) 1.75 GB 256 MB (512 MB recommended or more) yes yes
Windows Vista 32/64 bits(*) 400 MHz  (700 MHz recommended or more) 1.75 GB 256 MB (512 MB recommended or more) yes yes
Windows XP SP2 32/64 bits(*) 400 MHz  (700 MHz recommended or more) 1.75 GB 256 MB (512 MB recommended or more) yes yes

(*) Mathcad 15.0 runs under 32-bit under 64-bit OS.