Search for the "Support" or "Drivers" section on sites like Dell Support , HP Support , or Lenovo Support .

Windows XP requires to support modern Wi-Fi security like WPA2 . If your driver is installed but you cannot connect to modern routers, check your system version by right-clicking My Computer > Properties . If you are on SP1 or SP2, you may need to download the SP3 update manually from the Microsoft Update Catalog .

Before downloading anything, you must know the exact model of your Wi-Fi card. Right-click and select Manage . Click Device Manager in the left pane.

Look for a .exe (installer) or a .zip file containing .inf files. 3. Install the Driver