So everything is fine when I decrypt then I shrink it, which doesnt need to be done, then when I go back into Decrypter and try to backup I get: CreateFile Failed! The volume for a file has been externally altered so that the opened file is no longer valid. DeviceIoControl(FSCTL_LOCK_VOLUME) Failed! Unable to lock volume for exclusive access. Reason: The handle is invalid. Any help is appreciated!