: Windows XP (SP3), Windows Vista (SP1), or Windows 7. Processor : Intel Pentium 4 or AMD Athlon 64. RAM : Minimum 1GB.
: Portable versions typically require less than the standard 2GB installation space. The Risks of Downloading "Portable" Software : Windows XP (SP3), Windows Vista (SP1), or Windows 7
While "portable v11 free" downloads are tempting, they carry significant security and legal risks: "Real" Supported OS Versions for CS5 - Adobe Community : Windows XP (SP3)
: An intuitive way to merge, edit, and fill shapes directly on the artboard. Windows Vista (SP1)
: Tools to draw shapes and scenes in accurate 1-, 2-, or 3-point linear perspective.
CS5 was one of the last versions to offer robust support for 32-bit Windows systems.