Wireless network no longer working?

Long story... I had a working wireless network (Windows machines) bought an Apple Air Express to stream music too - whilst setting this up it something happened that killed my wireless network (wired still works) Now I can only get on the wireless network when I change the channel on my router and even so, one PC will not connect? any ideas what could have changed to cause this and how I can resolve it?


With regards to the one PC that wont connect - I can see my wireless network and select it but it will not connect - no errors??


Any ideas what I can try?

Wireless network no longer working?
You need to consider sources of interference as well. If you have to change the channel of the router then there is most likely a device using the same or neighboring channel that is interfering with the function of your wireless. The most common offender is a 2.4GHz cordless phone. It wouldn't even have to be your phone, if you've got a neighbor that has one it can interfere as well.


It sounds like your PC that can't connect to the wireless is either not getting an IP address for your router or it is getting the wrong address. Click start and run and type cmd and hit enter. Then type ipconfig /all and hit enter. This will show you what the IP address of your computer is once it is connected to the wireless. If it never connects at all then you likely have a configuration problem on your wireless profile. If you're using an encryption key make sure the key is correct and that the SSID you are using is also correct. If these check out fine then try removing the profile completely and re-adding it. I've seen windows screw up a profile and prevent it from connecting many time.
Reply:Turn off your modem and all computers on the network... reset the wireless router... turn that off too. then give it like 2 to 5 minutes. turn everything back on... starting with your modem first. them the router, then the wireless comptuers and last all wire computers. good luck!
Reply:It's possible that your wireless device is getting its ip address via dhcp and that's changed - if so, maybe you're on the wrong subnet? Can you ping your wireless device? If it's just an access point you should have settings in the device control panel.