Hey, I really need some help. 2 days ago, I turned my iBook G4 on, and loaded up safari and Msn messenger. When I my mac crashed. I thought no biggie I've had this a few times before, so I held the power button and it turned off. I rebooted and just as the os was loading it crashed again. I tried numerous times and it constantly crashes but at random times, once booted up it will be no longer than 2 minutes before it crashes again. I popped my Install disk in, and installed a frash copy of OSX 10.4 and during the install everything was running smooth, until it was time to enter my information to set up my mac. It crashed whilst trying to do this numerous times. I managed to fill it out real quick and the OS booted up for the first time, within 20 seconds it had crashed again. Its so annoying! I have also ran a hardware test and everything came back ok. Any ideas on what could be causing this problem? If I have to take it into an apple store do the " genius' " charge to have a look at hardware?