Step 1. You need to Right Click on MY COMPUTER icon -> then select MANAGE ->
Step 2. Then you will see a pop up with windows similar to the above image now at left select the Device Manager. 
Step 3. Now you need to find  Universal Serial Bus Controllers

Step 4.  Under Universal Serial Bus Controllers, select all the devices and with right click Disable all and see if it is working or not.

If the port was not working, then restart your computer. Don’t forget to enable that device later even after rebooting your computer.