My GUI program needs to communicate with a audio related hardware device via USB ports. However, I found some one computer always reboot when I plug in the USB cable . Later I found the reboot occurred under some conditions:

我的一个GUI程序要和一个Audio设备通过USB相连。但是，我发现有某台电脑，当把连接这个设备的USB线插入这台电脑时，十有八九会让这台电脑重启。而其它电脑无问题，另外有一台老机器很少会重启，但是在安装driver后，死活不认这个USB设备。后来我观察后，把引起重启的一些条件总结如下：

1: The device is connected to this USB cable and its power is turned on; OR
当插入USB线时，此设备是连着的而且是开着电源；

2: The USB cable has been already plugged in this computer, and device is connected, turn on the power by manual;
或是此USB线已连接两方，但是手动去开设备的电源时

3: Any other USB disk or USB flash work well if plug in to this computer;
其它USB 的flash或U盘插入无问题

4: This audio device can connect to other computers (No reboot problem);
其它电脑用此Audio设备正常（某台老电脑不认此设备，但重启不多）

5: Make sure it is not about USB virus;
已确定不是USB病毒

Due to above 5 conditions, I think the problem must come from the hardware device USB, I guess its some strange power or other things lead PC mother board OR PC power supply over-loaded, and then reboot PC.

I collected some information from internet:

Chinese:

Info 1: 可能接口电路设计有问题. 当USB设备插入时,接口有电涌导致的

Info 2: 有可能是以下几种原因：
A、 USB接口的供电不足，导致U盘不能正确使用或在数据拷贝过程中死机
B、 主板的USB设备兼容性差，在使用部分USB设备时死机，重新安装其驱动程序试试
C、 USB接口被人为损坏，或连接有误
D、在实际使用过程中，USB设备反过来插入USB接口当然插不进去，不过会把USB接口里面的塑料定位柱插断，继而把里面的数据或电源簧片短路，其结果就是系统死机或者因为电源短路无法开启主机，也可能表现为在使用过程中主机突然关机重启
E、机箱上的前置USB接口与主板上的F-USB跳线的连接。好主板有反接保护功能，当电源线接反时，即使你插入U盘或其他USB设备，也不会烧毁线路或设备。但一些低端主板其USB接口的供电是由开关电源接供给的，虽然可以很好的支持移动硬盘的使用，但当线路连接错误时，会直接烧毁主板或USB 设备。如果只是数据线接反时就无法发现USB设备

Info 3: 是静电问题，在插USB前先用手碰一碰插口再插USB就好了。

Info 4: 机箱有问题, 看看那里有接触的地方;

Info 5: 插u盘重启 只有两个问题

a: 静电所致: 由于室内空气比较干燥，U盘上有可能有静电存在，当你将U盘插入USB接口时会产生放电现象，导致重启。同时，必须保证机箱本身要良好接地。
b: 主板问题: 主板做工差，导致I/O接口不稳定。

English:

Info 1: If the front usb ports do this with different devices it could be a short of some sort or just wired wrong, front usb ports are typically part of the case and wired to the motherboard were as rear usb ports are part of the board so if the front usb ports were connected to the board wrong this could cause a short.

Info 2: I think it is somehow related to a bad/defective USB driver. Try re-installing new USB Drivers on your Opertaing System.

Info 3: I found that my power supply just wasn’t enough to handle to USB 2.0 addition. I found that if I removed another card (USB 1.1 card in a PCI slot), the computer was much more stable with regards to restarting.

Info 4: If your computer is a little older, this might be the problem. If you can, try removing something that would drain power from your motherboard, such as an additional card you no longer use, then you could look into upgrading your power supply.

Info 5: It is possible that you are touching the case and get a very small shortcircuit which causes your computer to reboot. To avoid this try and use a long USB cable to connect your USB devices to it so that you won’t need to put your hands in the back of your computer.

Info 6: If your PSU is 250W, then you may have a problem.

Info 7: I think your Usp ports is shorting somewhere and usually at my work that means replacing the motherboard.
That is my experience, I get this sometimes on notebooks that when you plug in the usb drive the pc restarts, replace the motherboard and baddabing the problem is resolved.

Info 8: It does sound like a power supply issue, to be sure. Power supplies that come with a pc are usually junk and once they age they go bad or cant handle todays stuff on them.

下次试试下面这个工具是否有效：

http://driveragent.com/