I recently installed a new 250 GB hard drive in my 800MHZ emac. I did a nice clean install of 10.4 on it and all was going well. The problem is that it randomly freezes after about 10 or 20 minutes. Mouse locks up, keyboard doesn't work. I tried pinging it from another computer and there was no response. I hold the power button in to shut it down and when it reboots it works fine for a while and then freezes again. I checked the console and it had this: Mac OS X Version 10.4 (Build 8A428) 2006-02-10 20:36:25 -0500 2006-02-10 20:36:26.072 loginwindow FSResolveAliasWithMountFlags returned err = -1407 I ran the disk utilty checks and they come up clean. I have tried reinstalling os x with no luck. Anyone have any ideas?