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Understanding Device Manager Error Codes

Beginner Device Manager Codes Applies to: Windows 7, Windows 10, Windows 11

A number next to a yellow warning triangle in Device Manager, each with a specific documented meaning — here's the general approach before you look up your specific code.

Before you start: save any open work and note down what you were doing when the problem started — that context helps if you need to search further or ask for help.
  1. Open Device Manager (search for it in the Start menu) and look for a device with a yellow warning triangle — right-click it, choose Properties, and the General tab shows the specific numbered code and a one-line description.
  2. These codes are officially defined by Microsoft (not by the device manufacturer), so the same code means the same underlying issue no matter which device shows it — a Code 43 on a graphics card and a Code 43 on a USB device point to the same category of problem, just on different hardware.
  3. For most codes, try this general sequence first: right-click the device > Update driver, and if that doesn't help, Uninstall the device (not "disable" — actually uninstall), then restart, since Windows redetects and reinstalls most hardware automatically on boot.
  4. If a specific driver version is the suspected cause — particularly right after a Windows Update — try Properties > Driver tab > Roll Back Driver, if that option is available.
  5. Check the specific code you're seeing against our individual code pages for anything code-specific worth knowing, since a few codes (like 45, which often just means the device genuinely isn't plugged in) have a much simpler explanation than the general steps above would suggest.
Still not fixed? Send us the details and we'll help you dig further, or browse related guides in Device Manager Codes.

Frequently Asked Questions

Do all Device Manager codes mean something is broken?
Not always — some codes, like Code 45, often just mean a device isn't currently connected, which isn't a fault at all. The specific code matters for understanding what it actually indicates.
Is it safe to ignore a Device Manager warning if the device still seems to work?
If the device is functioning normally despite a warning icon, it's reasonable to address it when convenient rather than urgently — but it's still worth resolving eventually, since some codes can indicate an intermittent issue that isn't obvious yet.

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