The Vostro 260 has two driver options. The Realtek for the Vostro 260 has been added to this website. Below you will find the wireless driver for the computer. The driver was released in 2011 and last updated in December 2013. Note were else the hardware has been used.
The following is for the 1502 wireless driver:
Supported Operating Systems
Windows 7, 32-bit
Windows 7, 64-bit