Distance from the router: To ensure stable wireless connectivity, make sure that your computer is within range of the wireless router. Computers may also have problems connecting to wireless networks due to interference from neighboring wireless devices such as cordless phones and microwave ovens. To avoid wireless interference, changing the channel of your router is recommended.
Incorrect wireless key/password: Connecting to a secured wireless network requires WEP, WPA™ Personal or WPA2™ Personal security key or passphrase. You may encounter this error when you have changed the wireless settings of your router. To avoid this or if you are unsure about your wireless key or password.
Outdated adapter drivers: Your computer’s wireless adapter performs better if the drivers are up-to-date. Wireless adapter’s compatibility with Wireless-AC, N, G, A or B standards should also be considered. Contact your hardware manufacturer for complete specifications of your wireless adapter.
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Linksys Smart Wifi Login | Netgear Orbi Setup