HP ProBook 355 15.6 Inch Notebook PC/Laptop, AMD Quad-Core A6-6310 Up To 2.4GHz, 8GB DDR3, 1TB HDD, DVDRW, AMD Radeon R4 , Windows 7 Pro 64-bit / Windows 8 Pro 64-bit AMD Quad-Core A6-6310 Processor provides power to handle all your computing tasks 8GB DDR3 memory, allows you to run multiple applications without any delaymassive space 1TB hard drive, provides a massive space for your storage-hungry applications and programs 15.6 diagonal LED-backlit HD anti-glare (1366 x 768) Windows 7 Professional/Windows 8 Professional 64-bit operating system, offers a user-friendly environment to work on