Or do i need to completely reinstall? 10.5.5 has completely killed my iMac's ability to stay on the network. every night i am booted off and if i play wow it kicks me off as well and just keeps saying it cannot get an IP address. worse still i cannot reconnect the imac to the network unless i leave the modem/router/imac off until the following morning. im not interested in workarounds, i just want to go back to 10.5.4 and see if that works. ive spent days on this and im tired of the BS.