Linksys Wireless not working

I got a Linksys 2.4 Ghz wireless router. It is connected to my main computer and sends the internet to a desktop upstairs with a wireless adapter. It has been working fine for the past 3 or so months. Then it just stoped working. The wired internet is fine but when i try to connect from upstairs it says it is connected but no internet. I have tried reconfiguring my wireless router several times but no luck.

Try doing ipconfig /all which will give you info on all the settings in your adapters and post back the results.

Also check your internet connection settings. Under LAN check that your Desktop upstairs is set up to 'automatically detect' and not use a fixed IP (Make sure DHCP is still enabled on the router), no need for anything in the DNS field.

Make sure that your ISP login details are configured in the WAN settings correctly on the router!

Need the IPconfig/all data though

Regards