If you have no any Intel Pro/Wireless driver, then you can easily download from here. The Intel PRO/Wireless 3945ABG Network Connection is an embedded 802.11a/b/g PCIe Mini Card network adapter operating in the 2.4GHz and 5GHz spectrum. The new solution has support for the latest wireless industry standards, and offers a host of features that will enhance today's mobile lifestyle.
This version requires Windows 7 32 bit. The download link of Intel Pro/Wireless driver is below to download for free,