USB disk Copy files when the computer will restart how to do

Use U disk to copy files when the computer is always restarted, but the U disk unplugged after will not be, with anti-virus software also useless, redo the system is useless, in the end where is the problem?

In fact, this problem is rare, but first of all to confirm that there is no virus or trojan, an anti-virus software may also be checked out, use a few anti-virus software to try, or simply a little bit of the format of the U disk, format and then see if the restart.

If reboot is possible, there is a problem with the USB controller driver for the motherboard, it is recommended to reinstall the motherboard's USB2.0 drive. If the driver update does not help, it is recommended to try to use the other U disk will not appear the same situation. If the USB disk is damaged, it is possible to generate current surges at the time the file is copied, the motherboard's USB protection circuit is not complete will directly cause the restart, but not every motherboard will appear in this situation, if the other U disk on your machine can be used to determine the normal use of the U disk has failed. Then only change a U disk or take to repair.