autocheck is being run because a dirty bit has been identified on the drive / partition in question. Unfortunately, autocheck does not run with the /r switch - it only checks the drive, it doesn't repair it. Assuming "D" Drive is the partition or drive being checked, what you need to do is open a command prompt within Windows and type: chkdsk d: /r (and then press enter). As long as it isn't your system partition, checkdisk will run. It may tell you the drive needs to be unmounted. Just say "yes". If it IS the system partition, you will be asked if you want to run checkdisk on the next boot. Say "yes" and reboot. Checkdisk will run and attempt to repair the problem. Hopefully it will be fine after that.