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Devices & drivers · scoped error record
Code 12

Device Manager Code 12: Windows cannot find enough free resources for the device

Code 12 is a resource-allocation problem; confirm the exact device before changing other hardware or firmware settings.

Applies to: Windows 11 Device ManagerReviewed: 2026-09-17

What it means in this context

Microsoft describes Code 12 as Windows being unable to find enough free resources that the device can use. The conflict is about system resources assigned to hardware, so random driver deletion is not a reliable first step.

Start here
  1. Confirm Code 12 in the affected device’s Properties > Device status.
  2. Record the exact device and any recently added hardware.
  3. Restart Windows once and install current firmware/driver updates from the PC or device manufacturer.
  4. If the error began after adding hardware, test without that recent hardware when practical.
1

Use the device-specific and firmware path

Medium risk

Why: Resource conflicts can depend on firmware/PCI configuration and the specific hardware combination.

  1. Check the PC/device manufacturer for BIOS/UEFI, chipset and device-driver updates that apply to the exact model.
  2. Avoid changing unrelated BIOS resource settings without vendor guidance.
  3. If the conflict persists, use the hardware manufacturer’s support path with the Code 12 details.
Scope boundary

When not to use this record

Do not treat Code 12 as a generic “corrupt driver” code; its documented meaning is resource availability for the device.

If it persists

If removing newly added hardware clears the code, focus on the conflicting device/firmware combination rather than broad Windows repair.

Evidence

Reviewed source

Related authority records

Continue with the same failing system

These links share the same component or repair context; they are not generic keyword suggestions.

ErrorCode 22 — Device Manager Code 22: the device is disabled

Code 22 means Windows sees the device but it has been disabled; enable the device before reinstalling drivers.

ErrorCode 45 — Device Manager Code 45: hardware is not connected

Code 45 is a connection/presence state; reconnect or power the hardware before changing drivers.

ErrorCode 10 — Device Manager Code 10: “This device cannot start”

Code 10 means the device could not start; Microsoft’s primary resolution begins with the device driver.

ErrorCode 28 — Device Manager Code 28: drivers are not installed

Code 28 means Windows does not have the driver installed for the device; reinstall the device driver rather than applying unrelated fixes.

ErrorCode 31 — Device Manager Code 31: Windows cannot load the required drivers

Code 31 is a device-driver loading failure; keep the troubleshooting scoped to the affected hardware.

ErrorCode 43 — Device Manager Code 43: Windows stopped a device after it reported a problem

Code 43 means a driver controlling the device told Windows that the device failed in some way; driver and hardware context both matter.