Hello All, I have a brand new Toshiba satellite A215-S5815 that had Win.Vista installed, i have formatted and installed Win.XP SP2 but the WLAN does not work, also i did try different driver and still doesn't work. If anyone had this issue or knows what needs to be done please help!! Thanks.

SOURCE: Toshiba satellite A215-S5815 WLAN issues with Win.XP SP2

They don't list an XP driver for your model. Based on diljale's comments, though, I was able to discover that Atheros uses a single driver for all of its models, and he says you've got an Atheros card.

The direct download link, which may even work, is here:
http://cdgenp01.csd.toshiba.com/content/support/downloads/driver_wifi_atheros_27763A.exe

If that does not work, go here:
http://www.csd.toshiba.com/cgi-bin/tais/support/jsp/modelContent.jsp?origin=new&ct=DL

Pick operating system XP
Pick All Categories, and scroll down to Wi-Fi (It may be so far down the list it won't show on your screen).
Find the first/latest Atheros Wi-Fi driver and you should be in business.

You may also wish to consider visiting http://www.radarsync.com and downloading the free software there, which attempts to tell you which drivers are out of date and tries to offer download links to the newest versions. RadarSync has many many flaws, but it can sometimes be helpful.