I have 2 PC's (Vista and Ubuntu) and a Mac. I reformatted my flash drive to hfs+ so that it can read on my Mac. When I reformatted it again back to ntfs, Windows recognizes it in the disk management utility but it will not mount the drive. I tried the option to change the drive letter and path with the utility but it keeps giving me an error saying that the window needs to be refreshed, the utility needs to be restarted or the computer needs to reboot. I did all of those and end up with the same error. Any suggestions?