ContributionsMost RecentMost LikesSolutionsRe: Will having all my computers on the internet slow down my Internet connection? I have the slowest speed cox has available,and i have had the same problems. I have 3 desktops, 2 wireless laptops, 2 iphones, 2 wireless cameras, X-Box. all an the same network. Part of the problem was my desktops all wanted to do their updates at the same time... Default settings for windows.. Schedule updates at different times on each machine. This will help to eliminate using all your bandwidth at any given time. And.. as the other post said a unsecured router or a infected machine will result in low bandwidth. if you have a router check your logs, also you can see all devices connected to your connection