High Speed Cable???

We have been fighting with the cable company here for a while (Insight Cable). In the evenings often at about 7:30pm-9:30pm I get dropped constantly. It can start as early as 6 and go as late as 10 but its normally within those 2 hours. We have bought a new router, we have tried without the router, we have made them change the modem and still it does it.

Ken called them and the phone kept cutting off his outgoing voice which is what happens to me on the computer. They are going to send people out to check out the line on Tuesday but the stupid thing is they send them out during the day.

There is no problem during the day and the techs will go 'your line looks great'. The only thing I can think of is that someone is running something in the evening that interferes with the cable signal. But that is just a guess on my part.