This is the latest driver (15.3.1) for Windows* 7:
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22116
And for Windows* XP:
https://downloadcenter.intel.com/Detail_Desc.aspx?agr=Y&DwnldID=22118
For Windows* Vista and other older driver versions:
Intel� PROSet/Wireless Software; Intel� PROSet/ Wireless Software Downloads
Intel� Wi-Fi Products; Which operating systems are supported by Intel� Wireless Products?
If you still need assistance please indicate the link you have problems with and your operating system.