Another possible cause of bad internet connection

This weekend, my laptop couldn’t connect to the internet and I thought that I was having problems with my provider. But when the technicians came, they plugged their own laptop to my outlet and things were running smoothly. We then plugged my old PC into the internet and it too was doing well. I was advised to check or replace my LAN card and that will probably do the trick For the meantime, I will need an external hard drive for my files and have my laptop brought to the vendor. I hope the warranty will work to my advantage.