The error “Not Enough USB Controller Resources” can be frustrating and annoying, especially if you have multiple USB devices that you need to connect to your Windows computer. This error occurs when there are too many USB devices attached to your computer and the system is unable to allocate enough resources to the USB controllers.

However, there are several ways to fix this error and ensure that you can connect all your USB devices to your system without any issues. In this article, we’ll go through some of the effective solutions to fix the “Not Enough USB Controller Resources” error on a Windows computer.

Solution 1: Disconnect Unnecessary USB Devices

The easiest solution to this error is to disconnect unnecessary USB devices that aren’t in use. If you have multiple USB devices, such as printers, scanners, or external hard drives, that are connected to your computer but aren’t being used, disconnect them to free up the resources on your USB controllers.

One way to do this is to go to Device Manager, select the USB controllers, and then disable any unused ports. To do this:

1. Press Windows + X and select Device Manager.

2. Expand the Universal Serial Bus Controllers section.

3. Right-click on any USB port that isn’t in use and select Disable.

4. Once you have disabled the unused USB ports, restart your computer.

Solution 2: Install USB Controller Drivers

If you’re experiencing the “Not Enough USB Controller Resources” error, it could be due to outdated or missing USB controller drivers. To fix this, you need to install the latest drivers for your USB controllers.

1. Press Windows + X and select Device Manager.

2. Expand the Universal Serial Bus Controllers section.

3. Right-click on the USB controller that is showing the error and select Update Driver.

4. Select the option to search automatically for a driver update.

5. Follow the on-screen instructions to download and install the latest driver updates.

Solution 3: Increase USB Resource Allocation
If the above solutions didn’t work, you can try increasing the USB resource allocation. Here’s how to do it:

1. Press Windows + R to open the Run dialog box.

2. Type regedit and press Enter to open the Registry Editor.

3. Navigate to the following key:

HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\USB

4. Right-click on the USB key and select New > DWORD (32-bit) Value.

5. Name the new value “DisableSelectiveSuspend” and set its value to 1.

6. Restart your computer.

Solution 4: Change BIOS Settings

If none of the above solutions work, you can try changing the BIOS settings. Here’s how to do it:

1. Restart your computer and press the F2 or Delete key to enter the BIOS setup.

2. Navigate to the Advanced tab and select USB Configuration.

3. Change the setting for USB Legacy Support to Enabled.

4. Change the setting for USB 3.0 Support to Enabled.

5. Save the changes and exit the BIOS setup.

In conclusion, the “Not Enough USB Controller Resources” error is a common issue on Windows computers. However, by following the solutions mentioned above, you can fix this error and connect all your USB devices to your system without any issues. If you’re still experiencing the error, it may be due to hardware issues, and you should consult a professional for assistance.