Why does the Internet only work at 10mb?

Question

Windows

Guys, such a problem. Recently, after cleaning the computer, one operative burned out (not completely inserted). Then I reinstalled Windows and after that the Internet began to work only at 10 MB. I've tried all the settings, nothing works. I also connected another cable and the computer shows that the connection is 100mb, but the Internet does not work. Tell me, the network mb burned out or something else.

Answer 1

Try another network
cable Or the cable is damaged or the network is dying (I think the second one)