Upgrade to the version linked above.  http://dl.covecube.com/DrivePoolWindows/beta/download/StableBit.DrivePool_2.2.0.877_x64_BETA.exe It the issue persists, then do this: http://wiki.covecube.com/StableBit_DrivePool_System_Crashes   Posting the text above isn't really helpful, as there isn't really any real info in the post.  Unplug the drives.  That should stop the issue, at least temporarily.  Then upgrade