HP ProBook 6570b 15.6" Business Notebook PC - C6Z48UT Operating system installed - Windows 7 Professional 64 (available through downgrade rights from Windows 8 Pro) Processor - Intel Core i5-3210M (2.50 GHz, 3 MB L3 cache, 2 cores) Standard memory - 4 GB 1600 MHz DDR3 SDRAM Internal drives - 500 GB 7200 rpm SATA II Optical drive - DVD+/-RW SuperMulti DL