由于电脑自身安全、商业机密保护的需要，常常要禁用电脑USB接口，尤其是禁用带有USB存储功能的设备，如U盘、移动硬盘和手机存储卡等，但同时又不能完全屏蔽USB接口的使用，因为现在很多的鼠标和键盘都是USB端口。这种情况下，如何限制U盘使用而又不影响USB鼠标和键盘的使用就成为网络管理的一个目标。本文介绍两种禁止使用U的方法：
一.BIOS禁用USB端口
重新启动计算机,在启动过程中按键盘上的Delete键，进入BOIS设置界面，选择“IntegratedPeripherals”(集成设备)选项，展开后将“USB 1.1 Controller”(USB1.1控制器)和“USB 2.0 Controller”（USB2.0控制器）选项的属性设置为“Disabled”(禁用)。再给BOIS设置上一个密码，这样他人就不能轻易修改BOIS设置了。
缺点：当你想再用USB设备就比较麻烦
**************************************************************************************
二.注册表禁用U盘的方法
禁用U盘：
1、运行REGEDIT,
2、展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR,
3、右击Start，将其值改为4，则可将U盘禁用，若要取消禁用，只需将4改回3.
**************************************************************************************
禁止使用USB存储设备的注册表内容如下：
在记事本把代码保存成一个名为lockusb.reg的reg文件，然后双击该文件导入注册表就完成了禁止该计算机使用USB存储设备的操作。所有用户都无法用USB存储设备了。
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR]
"Type"=dword:00000001
"Start"=dword:00000004
"ErrorControl"=dword:00000001
"ImagePath"=hex(2):73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,\
52,00,49,00,56,00,45,00,52,00,53,00,5c,00,55,00,53,00,42,00,53,00,54,00,4f,\
00,52,00,2e,00,53,00,59,00,53,00,00,00
"DisplayName"="USB大容量存储设备"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR\Security]
"Security"=hex:01,00,14,80,90,00,00,00,9c,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,60,00,04,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\
05,12,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
20,02,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,0b,00,00,00,00,\
00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,23,02,00,00,01,01,\
00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
开启USB存储设备使用权限的注册表内容如下：
代码保存成一个以unlockusb.reg后缀的reg文件，双击该文件导入注册表就完成了开启该计算机使用USB存储设备的操作。所有用户都可以使用USB存储设备。
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR]
"Type"=dword:00000001
"Start"=dword:00000003
"ErrorControl"=dword:00000001
"ImagePath"=hex(2):73,00,79,00,73,00,74,00,65,00,6d,00,33,00,32,00,5c,00,44,00,\
52,00,49,00,56,00,45,00,52,00,53,00,5c,00,55,00,53,00,42,00,53,00,54,00,4f,\
00,52,00,2e,00,53,00,59,00,53,00,00,00
"DisplayName"="USB大容量存储设备"
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\USBSTOR\Security]
"Security"=hex:01,00,14,80,90,00,00,00,9c,00,00,00,14,00,00,00,30,00,00,00,02,\
00,1c,00,01,00,00,00,02,80,14,00,ff,01,0f,00,01,01,00,00,00,00,00,01,00,00,\
00,00,02,00,60,00,04,00,00,00,00,00,14,00,fd,01,02,00,01,01,00,00,00,00,00,\
05,12,00,00,00,00,00,18,00,ff,01,0f,00,01,02,00,00,00,00,00,05,20,00,00,00,\
20,02,00,00,00,00,14,00,8d,01,02,00,01,01,00,00,00,00,00,05,0b,00,00,00,00,\
00,18,00,fd,01,02,00,01,02,00,00,00,00,00,05,20,00,00,00,23,02,00,00,01,01,\
00,00,00,00,00,05,12,00,00,00,01,01,00,00,00,00,00,05,12,00,00,00
写保护操作：
1、运行REGEDIT,
2、展开HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet,
3、右击Control项,选择新建,重命名新建项为WriteProtect,并设置其值为00000001(十六进制),然后刷新即可.
4、若要取消对闪存写保护的限制,将值改为00000000即可.
