Fix: ‘Not enough USB controller resources’ on Windows 11

Using the USB ports, we connect various devices to our PCs. Availability of multiple USB ports, lets the PC to handle more than one USB device simultaneously. But there exists a limit to the USB Endpoints. They are buffers for transferring data between the host and the device. Thus, when these endpoints exceed the maximum limit of the host controller, it disconnects the external device and display the error message of ‘Not enough USB controller resources ‘. Hence, this guide will provide the main fixes using which the users of Windows 11 can solve the issue of Not enough USB controller resources.

Fix: ‘Not enough USB controller resources’ on Windows 11

There may exist various reasons for the occurrence of the issue of ‘Not enough USB controller resources’, viz, outdated drivers, hardware issues, corrupted USB port, etc. Therefore, let us check the main fixes which will allow us to solve the problem in detail.

Fix 1: Running Hardware and Devices Troubleshooter

The first thing which the users should try is running Hardware troubleshooter for fixing the issue of Not enough USB controller resources. However, in Windows 11, the Hardware troubleshooter is buried somewhere. Thus, let us check the steps to invoke the troubleshooter and run it.

Step 1- At first open Command Prompt as an administrator.

Step 2- Next copy and paste the prompt given below and press Enter-

msdt.exe -id DeviceDiagnostic

Step 3- Now, the Hardware troubleshooter will appear. Click next and follow the prompts appearing on the screen for completing the scan.

Step 4- After the completion of the scan, restart the PC.

Fix 2: Connecting Devices to USB 2.0 Ports

If the users are using USB 3.0 port to connect their USB flash drive, then, they can shift to USB 2.0 port. As USB uses too many endpoints, it may cause the error. Hence, simply connecting to USB 2.0 port can solve the problem. The users can also try connecting to a USB hub or external USB hub which may lower the direct power consumption of the USB port and fix the issue.

Fix 3: Updating Chipset & USB Controller Drivers

Outdated or missing USB drivers in the system may also add to the mentioned issue. Hence, updating the USB drivers of the system is another fix that can be adopted by users to fix the issue. Now, let us see the steps to update the drivers-

Step 1- Firstly, open Device Manager.

Step 2- Next, locate the Universal Serial Bus Controller and expand it.

Step 3- Right-click each of the USB drivers. Now, select Properties > Update Driver.

Step 4- Further, in the Update Drivers window, press Search automatically for drivers.

Step 5- Lastly, follow the prompts that appears in the screen to install the updated drivers.

Fix 4: Reinstalling USB Drivers

If the above-mentioned fixes are not working, then reinstalling the USB drivers is another way which can solve the issue. The users can try doing it with the following steps-

Step 1- Go to Device Managers. Locate the USB driver with the name host controller under Universal Serial Bus Controller. Thereafter, right-click on it and select uninstall.

Step 2- Lastly, restart the PC and Windows will automatically reinstall the USB drivers.

Hope this solves the issue!