@terziyski This time it works the firmware upgrade. That was the correct version, sadly only the same laptop cannot connect to internet, I did forget and re connect again and connects to WiFi but...

@terziyski Hi, thanks again for your support. Still receiving the same error during firmware upgrade with the last version you shared. Seeing physically, my router´s region is ES. See image below....

@terziyski Thank you, but I got again the same error with your last firmware version. Error Code: 4503 The uploaded file was not accepted by the device. The language in the router is in spanish and...

@terziyski Hello, thanks but the firmware upgrade failed and I got thie error: Error Code: 4503 The uploaded file was not accepted by the device. I think is because the version you shared belongs to...

@terziyski Yes, the dell laptop has latest driver for wirwless adapter. My initial troubleshooting was update tp link firmware but the latest version available in that link you shared is from 2018....

@terziyski Hu, Today I turned on the laptop and the cannot connect to wifi again. I did "forget" to the SSID, connect again entering the password and doesnt work. No internet connection. I don’t know...