ProBook 4520s Notebook PC with Windows 7 Home Premium (32-bit); Intel Celeron P4500 CPU; Mobile Intel HM57 Chipset; 2GB DDR3 SDRAM, 1333 MHz, two slots supporting dual-channel memory, up to 8GB; 250GB SATA Hard Drive, 7200 rpm; Fixed 12.7mm SATA DVD+/- RW SuperMulti DL LightScribe Drive; 15.6" diagonal LED-backlit HD (1366-768) Display; 56K v.92 Modem, Atheros, Integrated 2MP Webcam.