Honestly the quickest and easiest solution is to purchase a new network card that is compatible with Windows 10, they are available form $5 online and very easy to fit into your PC, just make sure the card you purchase is the same size as that Intel PRO/Wireless 3945AB. On Windows® 10, starting from release version 20.120, a driver-only package is provided, no Intel® PROSet/Wireless Software in the package. On Windows 7/8.1., when you update Intel® PROSet/Wireless Software, the driver is also updated by default.
Intel Pro Wireless 3945abg Network Connection Driver Windows 10
Intel Pro Wireless 3945 Driver
Intel(R) PRO/WIRELESS 3945ABG/2200BG/2915ABG Drivers v 10.6.0.29 for Windows Vista
Supported OS:
Windows Vista* Business, 32-bit version, Windows Vista* Business, 64-bit version, Windows Vista* Enterprise, 32-bit version, Windows Vista* Enterprise, 64-bit version, Windows Vista* Home Basic, 32-bit version, Windows Vista* Home Basic, 64-bit version, Windows Vista* Home Premium, 32-bit version, Windows Vista* Home Premium, 64-bit version, Windows Vista* Starter, 32-bit version, Windows Vista* Ultimate, 32-bit version, Windows Vista* Ultimate, 64-bit version
Support for Microsoft Windows Vista:
1. An Inbox NDIS 6.0 driver is provided for the Intel® PRO/Wireless 3945ABG, 2915ABG and 2200BG Network Connections.
2. Intel® PROSet/Wireless Network Connection Software is not supported on Microsoft Windows Vista.
3. Only Intel wireless drivers are supported on the Microsoft Windows Vista operating system. Intel PROSet/Wireless Network Connection Software is not supported. Intel PROSet/Wireless will be replaced with Microsoft Windows Vista IHV service. Support for the Microsoft Windows Vista IHV service will be available in the upcoming software release from Intel in the second quarter of 2007.