When my desktop computer is wired via ethernet cable the signal turns off and on at 5-10 second intervals. Was suspecting a damaged ethernet cable. Other computers wired to this connection get a steady internet signal.
I think the problem started when we upgraded to a new 100 mbps internet speed and router installed by FIOS tech. He switched the desktop to wireless when setting up. I noticed the the change a few weeks and changed back to LAN and noticed the problem.
I prefer not to use wireless since there is a hard cable available at the location and we have many other wireless "only toys' on the system.
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