This usually indicates a missing driver. Usually, this is the "Base System Device" which is the Card Reader, or the "PCI Simple Communications Controller" which is the Intel Management Engine.
Drivers no longer provided directly by Sony. Where to Find Sony VAIO PCG-71315L Windows 7 Drivers sony vaio pcg 71315l drivers for win7
The most important thing you need to know is that This usually indicates a missing driver
"PCG-71315L" is printed on the sticker at the bottom right corner of the screen bezel or on the white regulatory sticker on the underside of the casing. This is a chassis/regulatory number shared across several configurations. Where to Find Sony VAIO PCG-71315L Windows 7
Fixes distorted screen resolutions and enables full Aero transparency effects in Windows 7. 3. Audio Driver Component: Realtek High Definition Audio.
To fix this, you must install the following three utilities , rebooting between each step:
: Enables Wi-Fi connectivity. Check Device Manager to see which card your specific sub-model uses. Ethernet Driver : Enables the RJ-45 wired network port.