This is a Lenovo ThinkPad T420 Type 4177-Q5U

CPU: Intel(R) Core(TM) i5-2520M @ 2.5GHz

RAM: 4096MB

HDD: HITACHI HTS725032A9A364

         320GB 7200 RPM 16MB Cache SATA 3.0Gb/s 2.5" 

Windows 7 Professional x64 installed and fully updated.

Lenovo System Update installed and all drivers updated.

Power Supply included.