Win7 computer in the U disk write protection invalid how to do?

Can say, u disk is our Win7 64 flagship version of the computer use most of the external computer equipment, many office workers are very familiar with the U disk, because we need to use the day-to-day office to it. But on the other hand, the security of U disk is also a very annoying problem, the occurrence of poisoning, damage, so many users are worried about the file will be damaged in the U disk, then how to solve this situation? In fact, the best way is in the Win7 flagship computer to our USB disk write protection, but recently , but there is the use of Win7 flagship computer users said that their own u disk in the write protection when the invalid situation, then this question, how do we solve it? The following, small series on the detailed introduction of it!

The first case: In general, we want to set a U disk for the state of write protection, you must first of its own U disk from the Win7 flagship computer, and then open the write protection, completed, and then the U disk to connect to the Win7 flagship computer, so Win7 flagship computer can be enough to identify.

The second situation: Of course, if the USB disk is plugged in to open the write protection, then we still need to select the U disk, and then reconnect to the connection.