Have you checked your cable modem signals and logs to confirm that your connection to the cable network is clean and stable? This is step 1 because if your cable network connection is no good, nothing else will help. There can be a lot of other problems but this is the first thing to check.
I have checked logs from both my modem and router which I also replaced with new equipment just to be sure it wasn't that. I ran ping tests to my modem to make sure its not my ethernet run going to my computer the only thing that has not been done is replacing the coax run to my apartment. When I asked them to do it they said there would be no point because they said the run was only around 5 years old and they had also found an issue at the node at the same time. Whatever the issue is it has been confirmed by cox to be on their end of the connection but no matter how many times I call a tech to look at it they cannot figure out how to fix it. Its either that or they will show up without reading any of the case notes completely blind to the fact that there were other techs working on it and it starts from square one every time.
