Section 7: Device Status and Error Codes

The Big Picture: The Dashboard Warning Lights

A car dashboard does not explain every fault in words. It shows a small light, and a number in the manual tells you what that light means. Device Manager works the same way. A small icon on the device tells you "something is wrong," and the error code (a number) says what.

Every device node has a status. It is one of three kinds:

Each problem has a numbered Code from a table Microsoft publishes. You will find the code in the device's Properties → General tab, in the box called Device status.

┌─ General tab ──────────────────────────────────────────┐
│ Device type:     Network adapters                      │
│ Manufacturer:    <maker>                               │
│ Location:        PCI Express Root Port                 │
│                                                        │
│ Device status                                          │
│ ┌────────────────────────────────────────────────────┐ │
│ │ Windows has stopped this device because it has     │ │
│ │ reported problems. (Code 43)                       │ │
│ └────────────────────────────────────────────────────┘ │
└────────────────────────────────────────────────────────┘

This section first covers the four codes you will meet most (1, 10, 28, 43), then the icon meanings, then a longer table.

7.1 Code 1: Device Is Not Configured Correctly

What it means: Windows found the device, but the driver set-up for it is incomplete or wrong. The message reads: "This device is not configured correctly. (Code 1)." In practice, it often means the driver is missing or its settings were not written properly.

Common causes:

What to try, in order:

1. In Device Manager, right-click the device and choose Update driver → Search automatically for drivers.
2. Download the maker's driver and use Browse my computer for drivers.
3. Restart the PC, then try again.
4. As a last step, uninstall the device (with the driver box ticked) and then Scan for hardware changes.

(Many guides say Code 1 means "driver not installed". The closer meaning is "not configured correctly," and a missing driver is one of the usual causes. Code 28 is the exact one for "no driver at all.")

7.2 Code 10: This Device Cannot Start

What it means: Windows loaded a driver, but the device would not start. The message reads: "This device cannot start. (Code 10)." Sometimes it is followed by an extra line with a more exact reason from the driver.

This is a very general code. The driver ran into a problem and gave up.

What to try:

1. Unplug the device and plug it into another port (try a port on the back of a desktop).
2. Try another cable.
3. Update or roll back the driver (Section 5).
4. Check the maker's site for a fix.
5. Look in the Events tab or in Event Viewer for more detail (Section 9.4).

7.3 Code 28: The Drivers for This Device Are Not Installed

What it means: Windows has no driver for this device. The message reads: "The drivers for this device are not installed. (Code 28)." This is the classic code for a brand-new device with no driver yet. The node often appears as Unknown device, or under Other devices.

Other devices
  └─ ⚠ Unknown device       <- yellow triangle, Code 28

Why: The Driver Store has nothing matching the device's hardware IDs, and Windows Update did not offer one (Sections 3 and 4).

What to try:

1. Read the device's Hardware Ids (Details tab, Section 3). Search the web for the vendor and device codes to find out what it is.
2. Download the driver from the maker of the device or the PC. (Laptop makers have a driver page for each model.)
3. Right-click → Update driver → Browse my computer and point to the folder.
4. Or run the maker's setup program.

7.4 Code 43: Windows Has Stopped This Device

What it means: The message reads: "Windows has stopped this device because it has reported problems. (Code 43)." The driver itself told Windows that the device has a problem, so Windows stopped it. It is common with USB devices and with graphics cards.

Causes (any of these can produce it):

What to try:

1. For USB: plug the device straight into the PC (no hub), try a different port and cable.
2. For graphics: check that the extra power cables are connected, and that the card is seated in its slot.
3. Restart the PC. Fully shut down and power on again, if you can.
4. Update the driver, or roll it back to the last one that worked.
5. Test the device on another PC. If it fails there too, the device is faulty.

7.5 Yellow Triangle vs Red X vs Down Arrow

What it is: The overlay on the icon tells you the kind of problem.

So today the only two icons you need to know are the yellow triangle (problem, read the code) and the down arrow (turned off, enable it). If a tutorial tells you to look for a red X, it was written for an older Windows.

Icons can be wrong. A node with no overlay can still have a driver that behaves badly, for example one that causes slowness. And a yellow triangle for a device you never use (such as an unused sensor) may be harmless.

Figure 14.3 — A Windows 10 blue screen with the Stop code IRQL_NOT_LESS_OR_EQUAL. Some device errors only produce a yellow triangle, but a badly behaved driver can also crash the whole PC like this. Photo: Oops4321, CC BY-SA 4.0, via Wikimedia Commons.

7.6 More Error Codes at a Glance

These are codes you may see. Meanings are short on purpose. Always read the full text in the Device status box on your PC.

About Code 52. On 64-bit Windows, drivers that run in the kernel must be signed (Section 4.1). A driver that is unsigned, changed after signing, or signed by an untrusted party can trigger Code 52. Do not switch signature checks off just to make an unknown driver work. Get a signed driver from the maker.

Codes are only a pointer. One code can have many causes, and the same fault can show different codes on different PCs. Use the code as a search term along with the device name.

7.7 Reading Errors Beyond Device Manager

Run those two command-line examples as a normal user. They only read.

Summary