Speed computer network problems

Some time ago to start my computer every day at about 8:00 on the super-card even start to open a web page are not open late into the night, but I did not think the problem is the beginning of a network of fluctuations in a phone call later to ask the telecommunications there is no problem now and the weekend has not even The beginning of the afternoon card, I think someone should be privately I Touzhao the network to use Is there an expert in the ways how to identify and solve this thing right?

do not know you or Netcom Telecom, Netcom, then there is a box, one on each floor you look at what other people do not even have your broadband network may be small, is not the kind of so-called telephone The fiber-optic access.
Due to limited bandwidth, as more users access, and all at the same time on the line, then there will be the issue.