Acer TravelMate B115-M TMB115-M-C99B 11.6" LED Notebook, Black (NX.VA1AA.007;TMB115-M-C99B) Windows 7 Professional 64-bit (available through downgrade rights from Windows 8.1 Pro) Intel Celeron N2840 processor Dual-core 2.16 GHz 11.6" HD (1366 x 768) 16:9 Intel HD Graphics with Shared Memory 4 GB, DDR3L SDRAM Memory + 500 GB HDD Max Memory: 8 GB