How to solve the win7 virtual machine can not identify the U disk problem

1. Run the virtual machine first, then click to view <;Toolbar--VM--“Settings--Hardware”, and then check if there is any "USB Controller" in the "Device” column, if there is no ADD then Just add one, if you want to continue to click on it, then check whether the right side is all checked, as shown below;

2, if you see the third item is gray can not be selected, the reason is because The USB port is not enough, it is used up in other virtual machine systems, so at this time we can open a different virtual machine system, and then change the "USB Controller" to "ldove" and then go back. In the original virtual machine system, re-ADD establishes a USB Controller, and selects all three options, and finally clicks ok to restart the computer;
3, after restarting the system, if the virtual machine prompts: "Host USB device connections For disabled”, the detailed prompt code is as follows:
The connection to the VMware USB Arbitration Service was unsuccessful. Ple Ase check the status of this service in the Microsoft Management Console.
Cause analysis: The reason for this is because the VMware USB Arbitration Service is not turned on on the local system.
Workaround: In the Win7 operating system, right click on the computer to select management options, in the open management interface, expand "Services and Applications - Services", then find and right click on "VMware" USB Arbitration Service” item, then select Start.

4, then restart the virtual operating system again, at this time we can see the USB logo in the lower right corner of the desktop.

5, the last mouse click on this flag, and then select "connect", insert the U disk can be identified.