I wast just installing Tiger on my 1.25 15" powerbook with 1 gig memory and 80 gig Hitachi drive. I made it through the install with out a problem which I did an erase and install. When the OS was up, I first used the Backup app to restore my files from my external USB HD. Everything went fine and I was able to use safari, mail and iTunes with no problems. I then installed iLife 05 which went without a problem. I opened iPhoto to verify my photos were restored successfully without a problem and all was well. I then went to install Quicken 2005 which I have stored on my external HD. The installer hung and I got an infinite beachball. I left it like that for 1/2 hour but nothing. I then did a hard reset ctrl + apple + power button. It rebooted but then went into beach ball when my user account was loaded and I waited for about 10 minutes before holding down the power key to shut it down. I then decided to zap pram but it did not work as it only made it to the same point with the same results. I then went to re-install tiger but my hard drive no longer shows up under the select destination. So I went into disk utility and it sees the drive just fine. I then went to format it and I get a failure with Input/Output error. I am currently doing a format with write all 0's option to see if I get a different error. After this I guess it is on to single user mode to see what I can see in there. Any suggestions?? Do I need a new HD?