PC kills my internet connection.

[Gatecrasher3]

So I have the dlink 108G router with my main PC, 360 (PC and 360 are connected LAN) and two laptops connected wifi. when I turn on my main PC, my internet connection cuts its speed down to %15 (or does not connect) on main PC laptops and 360. when my main PC is off my laptops and my 360 all run at full speed.
But what is really scary is that if I remove my main PC LAN cable from my main PC and then it on, my laptop/360 speeds are still affected!
how is that even possible?!
my router sits on top of my computer, but i moved it and nothing changed.
any ideas on how to fix this?

 

[DisgruntledVirus]

<-- computer help and networking forums post in one of those.

 

[nakedfrog]

Wrong forum, and, uh, if you remove the PC from the network and the problem still occurs, it's fairly safe to say the PC is not the problem (or at least not the entire problem).

 

[bsobel]

Guessing your using cat3 not cat5 cables?

 

[So]

Originally posted by: nakedfrog
Wrong forum, and, uh, if you remove the PC from the network and the problem still occurs, it's fairly safe to say the PC is not the problem (or at least not the entire problem).

Agreed. If the router is on top of the PC, I could see the PC producing interference and affecting wireless speeds only, but not wired speeds.

 

[Gatecrasher3]

wait, did i not post in the Networking forum? where did I post then?

Originally posted by: nakedfrog
Wrong forum, and, uh, if you remove the PC from the network and the problem still occurs, it's fairly safe to say the PC is not the problem (or at least not the entire problem).

anyhow, yes I am using CAT5e cable, and the problem starts as soon as I turn on my PC, and the problem ends as soon as I turn my PC off.
I have run many test using my laptop and find the same findings regardless if my PC is connected via LAN cable or not.