Lenovo B50-45 Business Notebook / 15.6" 1366 x 768 Display / AMD Quad Core A6-6310 APU / 4GB / 500GB / No Optical Drive / HDMI / WiFi / Bluetooth / Webcam / Windows 7 Pro with Windows 8.1 Pro License Windows 7 Professional 64; The system is preinstalled with Windows Professional software and also comes with a license and media (or media entitlement) for Windows 8 Pro (or later) software. You may only use one version of the Windows software at a time. Switching between versions will require you to uninstall one version and install the other version. AMD A6-6310, 1.8GHz, Quad-Core, AMD Radeon R4 Graphics 4GB DDR3 RAM , 500GB hard drive, No Optical Drive. 15.6 inch 1366 x 768 HD Display, Integrated 720p HD webcam, HDMI Output 802.11 b/g/n/ac WiFi connectivity and Bluetooth 4.0, Dolby Advanced AudioTM; 2x USB 3.0; 1x USB 2.0 ; 4-in-1 Card Reader ; SD/MMC/SDHC/SDXC) ; VGA ; HDMI ; RJ45 ; Audio-Jack