Network wifi slowing while main computer is on

Two things come to mind first...

a) bit torrent

Ensure bit torrent files aren't actively downloading/uploading. This can cause severe hit on your bandwidth and network speeds

b) virus

Viruses can cause endless issues, one of which is impacting network activity

Hmm, well I was using Norton 360 for a while, but just switched to MSE myself.

Perhaps try rebooting the router/modem by unplugging for at least 10 seconds and then plugging back in.

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This is going to be a long post, but bear with me. If you're not a "network guy" and the terms I'm using don't compute, just ask for clarification.

The WAN/Internet interface dupex on your router (preferably router and modem) should be "full". The speed and duplex should be running at 100/Full for most, if not all, of the router's interfaces. 9.99999 times out of 10, half-duplex is bad. A bad cable can cause a link to operate at half-duplex. Check your cable(s).

Your computer and PS3 don't have the same IP address, do they? Windows (assuming you're using that) will usually alert you to this. If they are sharing the same address, then half of the traffic destined for the PS3 is going to the PC and vice versa.

Assuming you only have one LAN subnet, the subnet mask should be the same for all devices on your LAN. DHCP should handle that if you're using it, though.

Is the PC or PS3 using a directed broadcast address? It's a rare scenario, but some devices/OSes allow that. An example of a directed broadcast address would be 192.168.0.255 if your gateway's IP is 192.168.0.1 255.255.255.0. Another example would be 192.168.0.31 if the gateway's IP is 192.168.0.1 255.255.255.224. If this is the case, then traffic destined to an IP like those listed will go to every host on that subnet. A good router shouldn't NAT for a directed broadcast, but you never know with consumer-grade stuff...

Is the PC running any kind of backups in the background either to the "cloud" or to a local storage device?

Is Windows Update pulling down any updates in the background?



Bottom line, there are lots of "little" reasons why this problem can occur, and it's hard to address (or think of) all of them or the possible combinations of all of them. A packet capture would probably help a lot.

Sweet! Way to go, man!