What should I do if the win7 computer cannot use the mobile hard disk to quit?

In the win7 iso image download, this is a situation that is often encountered with the U disk. Before that, Xiaobian once introduced that in the win7 iso image download using the U disk, there is no way to exit, we should How to operate can be solved, then here, we will replace the U disk with a mobile hard disk, how should we operate it? Below, Xiaobian will introduce you in detail!
Before we do, we will analyze The reason for the failure, as shown in the pop-up window, is that the reason why the mobile hard disk cannot be quit is because one of the programs is being used, or a program such as anti-virus software that we started is killing the virus.
The solution is as follows:
1. Return to the desktop interface of the computer, then find the computer icon on the desktop and right click, select the property option in the slide down menu.
2. In the Open Computer Properties window, click on the Device Manager option in the left menu bar.

3. In the window that pops up in, we click on the left menu of the disk drive, and then find the option in which the mobile hard disk is located, for example, small series here is TOSHIBA TransMemory USB Device, and then we double-click to open it.

4. Next will pop up as shown below in the mobile hard disk properties window, and we switched to a policy of this column, then quickly delete selected, click OK to exit the window.