you are a godsend..line 48 fix worked perfectly..The problem i was having was the same as others..in this forum post,but also if the clean disk was cancelled and tried again.the clean disk window wouldn't even show. After i ran the download in line 48.i rebooted the computer,then the computer unfroze and the clean disk worked like magic..thank you very much . I was just wondering why something like this would happen? it never happened before on my computer,and how can i prevent something like this from happening again?