Error Message:

Could not check volume drive letter for errors. The conversion to file system did not take place.

Explanation:

The Autoconv utility cannot run the Chkdsk utility on the target drive to fix any errors that may exist before the conversion is done. This may be because the drive could not be opened for the exclusive write access that Chkdsk needs.

User Action:

Once your computer restart is complete, run the Convert utility from the command line.