Power management is cutting power to the PCIe slot. Fix: Device Manager > Network Adapters > Intel WiFi > Properties > Power Management > Uncheck "Allow computer to turn off this device" . Also, disable "MIMO Power Save Mode" in the Advanced tab of the driver.
Look for a sticker on the LCD bezel (the frame around the screen) or near the keyboard. It will likely start with VPC (e.g., Go to product viewer dialog for this item. 2. Official Sony Driver Sources Sony Vaio Pcg-41213w Drivers
: Go to the Sony Support Laptop PC page and enter that specific model name (e.g., VPCSB...) to find official drivers. Introduction Problem 4: Blue Screen (BSOD) After Installing
: Includes one USB 3.0 port, two USB 2.0 ports, a full-size HDMI out, VGA, and a built-in DVD SuperMulti Drive. Driver & Support Information If you are looking for drivers, searching by " PCG-41213W Checking the laptop's documentation Looking up the model