My computer slows the internet to a crawl and I've tried EVERYTHING?

[rowlfe]

The problem is beyond your control. If you have cable broadband, it likely is "the party line effect". The connection to your ISP is where the bottleneck lies and that is not something you can do anything about. With the party line effect, it comes down to how many users are on the line with you. The more users, the slower everyone goes. Wireless and cable are essentially the same, only one uses a wire to carry radio signals and the other does not. The access point (at your ISP) has only one transmitter and can only talk to one at a time on the cable. So, if there are 10 users, you get 1/10th the time of the transmitter at your ISP. If there are 100 users, you get 1/100th of the time with the transmitter at your ISP. Do you see how that works? And why the number of users increasing is why your throughput is decreasing?