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Sony VPCZ14AGJ Wifi
It is cheaper and easier to purchase a common WiFi USB adapter and install it, than to replace any built-in adapter your laptop may have. 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 laptop. A lot of newer wireless adapters are simply plug and play, which just means that you only need to put the adapter into an available USB port and the operating system will take care of the rest. The WiFi in your laptop, if so equipped, uses an adapter in order to connect to your wireless router or modem.
Red flags your internal WiFi has very little life left
- The wireless adapter driver shows it as not installed
- The WiFi adapter on your laptop is unable to find a signal from your router
- The WiFi goes in and out during the day
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