If you search form sony site for PCG-3H1M you will get 'product not found', this is because the right model for PCG-3H1M is different such as Sony Vaio VGN-FW Series VGN-FW4ZTJ/H, so look carefully on the back stickers normally it state the right model.
Model: Sony Vaio VGN- FW41J/H
Series: Sony Vaio FW Series
Manufacture: Sony
Last Update: June 2013
Downloads: 1853
Sony Vaio PCG-3H1M / VGN-FW41J
Intel Sata driver registry patch
Version 080619a, 371.24 Kb
Download
Audio driver
Version 6.0.1.5886, 139.66 Mb
Download
Wireless LAN Driver (Intel)
32-bit 2.14 Mb Download
64-bit 2.72 Mb Download
Graphics Driver (ATI)
32-bit 106.37 Mb Download
64-bit 110.50 Mb Download
Graphics Driver (Intel)
32-bit 25.29 Mb Download
64-bit 26.3 Mb Download
Ethernet Driver (Marvell)
32-bit 357.89 Kb Download
64-bit 416.86 Kb Download
Alps Bluetooth driver
57.74 Mb
Download
Audio Driver (Realtek) HDMI
8.8 Mb 22/10/2009
Download
INSTALLATION NOTE:
Ethernet Driver (Marvell)_32 32 bits and 64 bits
1. Unzip the driver folder.
2. Open device manager by click start and type DEVMGMT.MSC and press enter.
3. A device manager will open, look for Ethernet/Network controller marked with yellow.
4. Right click and select update driver.
5. Select Browse My Computer For driver software.
6. Click browse and point to the driver folder we extracted earlier.
7. Next and continue with on screen installation.