Hi everyone, I have been pulling my hair out lately, trying to find a way to restore internet connection on my 27" i7 iMac. I know WEP isn't the best choice but that was the only way to make sure all computers worked properly. The technician tried other security protocols but some Windows machines couldn't connect to the internet. So, it's WEP or no security protocol at all, which isn't a viable option for obvious reasons. My router is a SMC ADSL2 Barricade g (SMC7904WBRA) and before getting the iMac I never got problems with it. Everything was fine and dandy until I came home yesterday and noticed the iMac internet connection was down. Every once in a while he does that, so I wasn't too worried. The problem is a common one: when he asks for the WEP password and I write it down, all I get is the "Connection timeout" message. All other Windows machines are working 100% by the way, which consist of a few laptops and a few desktops. The 27" i7 iMac (v 10.6.4) is the only affected computer. I know the password is right, so the problem isn't there. In the past, I've managed to get the iMac internet connection to work by changing the channel ID (when inside the router AdminPanel) from 6 to 11 or vice-versa. Or turning off and on the router. Turning on and off Airport. Deleted all the Keychain entries. Tried to add a $ in front of the password. Deleted com.apple.airport.preferences.plist. Unfortunately, none of that seems to be working now and I don't know what to do. Advice? I already spent several hours today on Google trying to find answers but 99% of the stuff I found was outdated, poorly explained or useless. Thanks.