When i try to change the settings in Photoshop CS3 a balloon pops up and says The file or directory WINDOWS\Prefetch\DWWIN.EXE-30875ADC.pf is corrupt and unreadable. Please run the Chkdsk utility. I run the Chkdsk utility and try to edit the settings again, but the same thing happens. What do I do? I have Windows XP service pack 3.