You may try resetting the TCP/IP and Winsock, as advised by joe_intel in a previous forum:
Before doing those steps, it would be good to download Intel® PROSet/Wireless Software and Drivers for Windows 7*, version 15.3.1.
Uninstall the program "Intel® PROSet/Wireless Software" if it was already installed.
Then Uninstall and Delete the driver software for the Wireless adapter from Device Manager.
Uninstall other Wireless adapter drivers, or 3rd party Virtual Network Software.
Reset TCP/IP and Winsock, and then reinstall the Wireless adapter driver for the Intel® Wireless WiFi Link 4965AGN.
If the issue persists it may indicate that your computer is not compatible with this wireless adapter. It could also be a hardware or operating system issue.