Code 12
This device cannot find enough free resources that it can use (Code 12)
Occurs when multiple devices are assigned the same I/O ports, same interrupt (IRQ), or same Direct Memory Access (DMA) channel.
What you may notice
- Device Manager shows Code 12
- Hardware acts erratically when another device is used
Likely Causes
- Resource conflict in BIOS
- Outdated BIOS
- Windows failing to manage IRQs properly
Before changing a driver
Record the exact error code and device name, save open work, and restart the PC once before making a deeper change. Check whether Windows Update or the PC maker has a model-specific package, and create an available restore point before removing software. Stop if the menus or hardware details do not match this guide.
Troubleshooting This device cannot find enough free resources that it can use (Code 12)
Follow this flowchart to isolate the cause of the error.
How to fix it
Step 1: Update BIOS
Flash the latest BIOS firmware for your motherboard.
Step 2: Disable Unused Devices
Disable unused serial or parallel ports in BIOS to free up resources.