Acer extensa 5220 Wlan/Wireless/lan XP Driver - Problem Solved

Choose base base on yours system specification, most Extensa  5220 use Broadcom wireless LAN Driver

Wireless
LAN Atheros Wireless LAN Driver 5.3.0.45 2.7 MB
Download

Wireless
LAN Broadcom Wireless LAN Driver 4.170.25.12 4.1 MB
Download
 
Wireless
LAN Intel Wireless LAN Driver 11.1.1.11 33.1 MB
Download

Use the silent-install.

Hope It helps.

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