I am having problems updated software through "software update". I have tried for weeks to update the quicktime update. My system is: dp 1.8 g5, 512mb. I was able to update itunes a few weeks back but since then I can't get quicktime to update or now garageband. I first thought it was just an issue with quicktime but now think that it might be the os. When I update it gets to the window where I put in my password and then it crashes and says that there has been an unexpected error. I have sent the crash report to apple each time. Any help here would be great...