My computer has the same problem. Actually, it should be the operating system. The universal driver in the system installed for you may be the latest and universal, but it may definitely not match your computer, resulting in very slow wired, but there is no problem with wireless. In this case, just go to official website and install the next network card driver. The driver suitable for your computer is the best. Master Lu only tests and updates these drivers, and will not remind you of the latest drivers.