Sony Vaio PCG-51211L (also known as part of the VPC-S Series
Open Device Manager (right-click Computer > Manage). Under "Display adapters," if you see "Standard VGA," you need drivers. If you see an unknown device with Hardware ID VEN_8086 (Intel) or VEN_10DE (NVIDIA), you have your answer. Windows 7 Drivers for Sony Vaio pcg 51211l graphics drivers