Systems & Devices Error Codes Directory

A directory of real-world system and device error codes, organized by subcategory with detailed code pages.

Systems and devices report failures through short numeric codes, hexadecimal identifiers, and plain-language status messages. This section organizes those signals into a consistent reference, focused on what the code represents, where it usually appears, and what safe next steps typically look like.

You’ll find operating system and platform errors, firmware and boot diagnostics, and device-level fault codes from common hardware categories. Every page is written to be scannable, linkable, and stable, so you can move from a symptom to the right family of related codes without guessing.

What you'll find here

  • ✓ Operating system, firmware, and device codes mapped to plain-language meanings
  • ✓ Safe troubleshooting checklists that avoid risky or invasive instructions
  • ✓ Related-code links to help you move between nearby prefixes and families
  • ✓ Featured and recently indexed pages for fast discovery

Browse by Category

Start with a systems or device subcategory, then browse the most common codes and the newest additions. Every link is crawlable and designed for fast troubleshooting.

🖥️
Operating Systems
20 codes
→
🏢
Business Systems
20 codes
→
🧾
POS Systems
20 codes
→
🛡️
Security Systems
20 codes
→
🖨️
Printers
20 codes
→
📶
Routers
20 codes
→
💳
POS Terminals
20 codes
→
🏠
Smart Devices
20 codes
→
⚙️
BIOS / UEFI
20 codes
→
🔩
Embedded Systems
20 codes
→

Recently Indexed

18 codes

193 - App failed to start

Business Systems Feb 27, 2026

Windows blocked an application from starting, often due to an invalid executable or missing dependency.

15241 - Payroll/update error

Business Systems Feb 27, 2026

A payroll or program update step failed after download, validation, or patch application.

Common / Featured

6 codes

49 - Service error

Printers ★ Featured

A printer firmware or job-processing failure caused the device to enter an error state.

0xC000006D - Logon failure

Security Systems ★ Featured

Authentication failed because credentials or required validation did not succeed.

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How to read systems and device codes

Most system and device error identifiers fall into a few common patterns:

  • Hex codes (for example, 0x8007…) are typically OS or platform-level results.
  • Short alphanumeric codes (for example, B200, 5B00) are often device-family diagnostics.
  • Message-style errors (for example, Error 651) are user-facing summaries that map to a lower-level failure.

When troubleshooting, prioritize reversible steps (retry, restart, confirm configuration, check logs) and avoid risky actions. For firmware, electrical, or safety-related scenarios, use manufacturer guidance and qualified service pathways.

Frequently Asked Questions

Are these codes official?

Some are published directly by vendors; others are user-facing messages that map to internal failures. Pages avoid claiming internal meanings when they are not publicly documented.

Why do codes repeat across different products?

Certain codes (especially OS or network errors) can appear in many contexts. A single identifier may be reused by multiple layers, so the page focuses on the most common, verifiable interpretation.

Can an error code have multiple causes?

Yes. Many codes describe a failure category rather than a single root cause. Use the “Where you usually see this” and “Troubleshooting checklist” sections to narrow it down safely.

Do you provide repair instructions?

Only safe, non-invasive steps are included. Anything that could be unsafe, irreversible, or hardware-invasive is intentionally avoided.

What should I do if my exact model isn’t listed?

Start from the closest hub (for example, printers or routers) and look for matching prefixes or message patterns. If a code is model-specific, manufacturer support is the most reliable path.

How are related codes chosen?

Related codes are selected by shared prefixes, text similarity, and category grouping so you can pivot to nearby diagnoses quickly.

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