| Problem | Likely Fix | |---------|-------------| | No brightness control | Install Intel Graphics driver, then Sony Firmware Extension Parser | | No sound after Windows update | Reinstall Realtek HD Audio driver, disable "audio enhancements" | | Touchpad not working | Install Synaptics driver, enable via Fn+F1 or check BIOS | | Wi-Fi drops | Update wireless driver, disable "Allow computer to turn off this device" in Power Management | | Blue screen on sleep | Update Intel RST and graphics drivers |
This comprehensive guide will help you locate, download, and install the correct drivers for your Sony PCG-31311L. 1. Identify Your Official Sony Model Number
The "PCG-31311L" number on the bottom of the chassis is a configuration code. For driver searches, you need the marketing model name
The safest and most reliable way to get drivers is through the official Sony support pages. Because Sony reorganized their support website after selling the VAIO division, the navigation can be tricky.