Windows 10: Access Denied on USB Com Ports

I am trying to use the Adruino IDE to program an Arduino UNO single board computer. This communicates via the COM port on the USB of my Windows 10 Computer. When connected, the IDE recognizes the board and can see which COM Port it is using. It can even download the UNO Board Information from the board. But when I try to upload a sketch program from the IDE to the UNO Board, I consistently get an IDE error message saying: Can't Open Device "\\.\COM3" : Access is Denied. I've trying moving to many other COM port numbers and to all three of the USB connections on my Acer laptop, but no luck. I'm suspicious that Microsoft Defender might be blocking access to this port when I try to upload a program through it.


Any other thoughts?

:)

 

Access denied to USB ports. Not a authorized user

I tried both methods and neither worked.

In method 1, step 5, "Run as administrator" did not appear.

Method @, I uninstalled the USB controller and restarted. I had the sane problem with access denied.

 

Access denied to USB ports. Not a authorized user

Hi Ron,

Welcome to Microsoft Community.

I understand your concerned. Let me help you to fix the issue.

Let’s try simple troubleshooting steps and check if this helps in resolving the issue. Follow the below methods.

Method 1.

I suggest you to run Hardware troubleshooter and checks for common issues and makes sure that any new device or hardware attached to your computer was installed correctly. Follow the below steps:

• 
  Press Windows + X keys on the keyboard and select Control Panel.
  
• 
  Type Troubleshooting in the search bar on the Control Panel.
  
• 
  Click on Hardware and sound under Troubleshoot computer problems.
  
• 
  Click on Hardware and devices under Devices.
  
• 
  Click on Advanced on the Hardware and devices dialog box and click on Run as administrator (Enter the credentials if required).
  
• 
  Click on Next and follow onscreen instruction complete the Hardware and devices troubleshooter.
  

If the issue still persist, try the below method.

Method 2.

I recommend you to uninstall and reinstall the USB port driver and check. Follow the below information provided.

• 
  Press Windows key + X and click on
  Device manager.
  
• 
  Locate for Universal Serial Bus Controller, click on it and expand it.
  
• 
  Right click on the USB port driver under Universal Serial Bus Controller and click on
  uninstall.
  
• 
  Once uninstall is done, restart the computer.
  

Hope this helps. Please let us know the status.

 

Access denied to USB ports. Not a authorized user

Denied access to USB ports. The message says I'm not authorized. This happened all of a sudden. I have tested all the ports and received the same answer. I have tested the usb my USB drives in other machines with success. I also so recieve an error
message that my recycle bin is corrupted on G: drive which is an external drive for backup. Once I unplug the drive, I don't get the message anymore. I could sure use some help!