HP Pavilion Slimline s3400t, Intel(R) Core(TM) 2 Duo processor E Intel(R) Core(TM) 2 Duo processor E4600 (2.4GHz), 4GB DDR2-800MHz dual channel SDRAM (2x2048) 4GB DDR2-800MHz dual channel SDRAM (2x2048) 500GB 7200 rpm SATA HD, LightScribe 16X max. DVD+/-R/RW SuperMulti drive, 256MB NVIDIA GeForce 8500GT DVI-I, Norton Internet Security(TM) 2008 - 15 Months , Microsoft(R) Works 9.0 , Windows Vista Home Premium