I have the most current version of Windows Vista x86 (32 bit) installed on my Dell XPS M1530, which uses a Samsung SSDR (256GB, S2, 2.5, RBAM) for a hard drive. Ever since version 2.16 of Defraggler was released Windows crashes shortly after I try to start Defraggler. It has gotten worse with later versions (now crashes immediately). Each time I have to go back and remove the current version and reinstall version 2.15, which continues to work properly as it always has. Can anyone tell me what is causing this annoying malady and how or when a fix might be available for this error. I have used CCleaner and Dafraggler for many years to keep all of my computers running properly. This is the first time I have seen any kind of a problem that would cause Windows Vista to crash !!! HELP !!! When Windows reboots it puts up some bogus message about the Raid Controller missing a driver and when I try to follow the link to the Intel fix for the problem I get an invalid page message. It says I am missing the iaStor.sys driver but it is right there in the Windows/System32/drivers folder. So there is no help for this problem !!!