My online gaming issues

Question

I got a Linksys WRT310N wireless router about 14 months ago. My computer, modem and router are upstairs and my TV, PS3 and Xbox 360 are downstairs. Everything was working fine until late February. One Sunday I couldn't get online with my Xbox. I figured it was just an issue at the moment with Live, but the following weekend I couldn't get online on Saturday or Sunday and it just kept getting worse in the weeks to follow.
During the time the PS Network was down I found I was able to get online with my 360 by jumping on other people's networks in my area that didn't need a password. The connection wasn't always great but at least it was something.
When the PS Network came back up I got serious about getting everything straightened out so I tried changing a bunch of settings on my router. All of the common suggestions: static IPs for consoles, port forwarding, etc. I was able to get on both consoles with my own network again, but it was way too slow to do anything. Images/icons wouldn't load and I couldn't download anything. Then last Saturday I tried adding my PS3 MAC address to the MAC filtering on my router's configuration page. After, I went to see if that did anything. I tried to download a Netflix update that I couldn't even come close to downloading before and it downloaded in like 5 seconds. So then I put my Xbox MAC address in too and Xbox Live worked great after. So it looked like my problem was solved.
The following morning I turned on the computer to go online and my connection speed showed that it had limited or no connectivity. I unplugged my modem and router, waited a bit, and plugged them back in, but it didn't solve anything. So I decided to just leave it alone for a while, thinking it might just be an issue with Time Warner for the moment. I went back 2 hours later and nothing had changed. It said the network did not assign a network address to the computer. I decided to give Time Warner a call.
After I told the woman I was speaking with that I already tried unplugging my router and modem she suggested I reset my router. I really did not want to do this as I had already spent so much time with it trying to get my gaming straightened out and I didn't want to lose the settings that were working for me the previous day. But it didn't really seem I had a choice and I was pretty sure I remembered all of the settings changes I made. So I reset the router and my internet connection for the computer was back.
So I went back in my router and made all of the changes for my gaming again and went to try both consoles. Both could get online but images/icons take forever to load again so I can't really do anything online and a few days later my computer was back to the "limited or no connectivity." I've reset my router countless times and tried changes in the settings but I still can't get anything to work for my consoles again. When I check my PS3 connection the signal strength is 95-100% but when I run the connection test it always fails when it gets to upload and download connection speeds. What are my options at this point? It is very frustrating.

Answer 1

Everything looks good, except I'm not sure why your PC lists the dns servers as 192.168.1.1. The only time I see a pc list the dns servers as the router's ip are when someone has loaded dd-wrt onto their  router and when they have selected dns masq. But you're still able to surf the web so I wouldn't worry about it. Since you have cable, all you should've had to do was select dhcp as the internet connection type and turned on upnp. Could you run ICET on internet explorer and see if you get any errors. 
PS: IF you still can, edit out your default gateway that you posted under status page. You usually want to keep that private. 
I don't work for Cisco. I'm just here to help.