I use Airport Express as the wireless network which is connected to the ADSL modem D-Link (DSL-302G). There are 2 clients connected to the wireless network. iMac OSX Tiger 10.4.11 desktop and HP laptop with Windows Vista. The problem here is the iMAC is getting connection dropouts all the time while the Windows laptop is connected to the wireless network without any problem. My iMAC is 3 months old and HP laptop is 1 week old. Is there anything I am not setting up correctly? Btw, the wireless network security is WPA/WPA2. Could anyone provide any assistance? I can't believe Windows is more reliable than an Apple in this case.