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Sony VGN-SZ640N Wifi
It is much simpler to buy a new wireless USB adapter and install it, than to replace any built-in adapter your laptop may have. WiFi, or wireless internet, makes use of a wireless adapter to send and receive signals to and from your router. Searching for a new adapter is simple due to the fact that all you need to know beforehand is the operating system that is installed on your Sony VGN-SZ640N. Most new Wifi adapters are simply plug and play, in that you just plug it in the USB port and the OS will install the drivers on its own.
Red flags your wireless internet adapter has very little life left
- Your WiFi on your laptop cannot see the SSID coming from your router
- The WiFi goes out randomly all the time
- The laptop wireless driver shows it as not installed
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