There are two options with the Vostro 220 computer. The first is an Atheros Wireless driver and also a Realtek driver which has been added below. There are a number of computers which use this driver so see below which computer uses this driver.
This driver was released in 2009 and was last updated in July 2012. Note the operating systems listed below which it will run on.
Supported Operating Systems
Windows 7, 32-bit
Windows 7, 64-bit
Windows Vista, 32-bit
Windows Vista, 64-bit
Windows XP, 64-bit
Note again that the file below is Version 126.96.36.199, A03 which was the last driver for the Realtek version for the Vostro 220 computer system. Search this website for more information if you have a different computer. There is a Windows 10 Realtek version on this website. Such as the Realtek RTL8102E Win8 32bit on this website.