I have a removable hard drive formatted to NTFS and hooked into a media streamer. When I unplug the drive from the streamer and plug it into my windows 7 system (the same one I used one format that drive!), I can see and access all the folders, but I am unable to do anything else. When trying to delete or copy any file to and from the drive, I get a file not found error. That's clearly not correct since, as I said, I can see that file in explorer or the command prompt.
If I plug the drive to an XP SP2 system I can do anything I want including copy and delete.