改程序实现了对U盘的禁用，对已经插入的U盘情况下先对盘符进行扫描，得到U盘禁用；对刚插入U盘，得到盘符直接禁用。大家可以参考一下。-Reform program for the disabled U disk, the disk has been inserted into the case of U first scan of the drive, U disk to be disabled just insert the disk U, the letter directly to dis