Hello, yesterday I bought my new "17 iMac, with 1.5gb and 160 gb hd. It was working very nice until I installed the last version of aMSN (release candidate 1) to try the webcam, and after a few unsuccesful tries, when I was to close the webcam window, a message popped up asking me to restart the computer. After I did, I sent the report to mac, and after browsing in the forums I saw some similar cases where you suggest using Disk Utility. Well, I hit Disk Utility and this came up: Anyone can help me here?? Thanks a lot BTW, the computer runs smoothly, It starts up very quick and runs programs fast.