All wireless devices on your network ( including the router) should be configured to use the same wireless channel. You should try to pick a channel not in use by he neighbors to reduce interference. Also if the router is not N capable ne sure the wireless mode is set to mixed.
I also see something that concerns me a little. Your default gateway and DNS are the same IP. This is usually indicitive of having a modem with routing capabilities. These are setup to be hooked to a switch or hub not a router. What happens is intermittent loss of connectivity much like you are seeing here. You will need to log on to the modem and set it to bridge mode in order to eliminate the conflict that is causing these losses.
Connect the the modem directly via ethernet. Do an ipconfig /release, ipconfig /renew, ipconfig /all. Write down the default gateway IP address. Open IE and enter the IP in the address bar. A login window should open. You will need to enter the default name password of the model manufacturer here. They are usually one of the following:
1. username: password: admin
2. username:admin password:1234 or 12345
3. username: admin password: guest
You will need to do the following: 1. turn off DHCP, 2. change the modem mode from router to bridge, 3. set the IP to match your internal LAN (ie 192.168.1.xxx for linksys/cisco). Remember to apply at each page before moving on or your setting will be lost. Once completed connect the powered down router and turn on wait for it to completely finish booting up and connect the computer to the router. Do an ipconfig /release and ipconfig /renew from the command line. All should now be well.
For all you moderators/forum people out there I would be happy to write a detailed pinned topic on this if for no other reason than I can stop typing all of this everytime. Let me know I can always send a word file over for your approval.
Get your facts first, then you can distort them as you please.