How to prompt the device when making System program of USB flash drive?

Undoubtedly, the use of U disk installation system is absolutely a lot of user's choice, the U disk is small and convenient, the use of more handy, coupled with this system of the way for the computer less requirements, but also become the first choice for many users. But recently listen to a friend said, in the use of a USB flash drive to install the system still encountered a trouble, do not know if you have been stumped? When you get a "device busy" prompt when making a USB flash drive system program, what do we do?

1. We know that in the production of the program, it is necessary to the computer all the anti-virus software and other programs to quit, because such programs often have a variety of restrictions, easy to lead to our operation is hindered, prompted the device is busy, there may be antivirus software in the mischief!

2. Maybe there are other files in the U disk, but we are in the production of USB flash drive System program, it is not possible to open the other program on the U disk, if there are, suggest that you want to close and try again.

3. Some USB stick may not be able to use our UltraISO tool, but it is the production process must use a software, you may wish to try other software to replace it.