Error Codes
Windows error codes in plain English
Search common Windows update, boot, storage, driver, and blue-screen messages. Each card points to a safer troubleshooting path.
0x80070002Windows update files missing or mismatchedThis may appear when Windows Update cannot find or match files it expects. Start with restart, storage space, and built-in update cleanup checks.Open guide0x80070005Access deniedThis usually points to permissions, account state, security policy, or a blocked update/app action.Open guide
0xc000000fBoot configuration problemWindows may not be reaching the boot files correctly. Check boot order, storage detection, recovery media, and recent drive changes.Open guideINACCESSIBLE_BOOT_DEVICEWindows cannot reach the boot driveThis can involve storage drivers, disk health, firmware mode, or a recent storage/controller change.Open guideDRIVER_POWER_STATE_FAILUREDriver or power-state conflictOften appears around sleep, shutdown, or wake behavior when a driver does not handle power transitions cleanly.Open guide0x80070422Required service is disabledThis may appear when Windows Update or a dependency service is disabled or blocked.Open guide0x800f081fWindows could not find repair source filesThis often appears during component repair. Check internet access, update state, and repair-source configuration before retrying.Open guideCRITICAL_PROCESS_DIEDA critical Windows process stoppedThis blue screen can involve drivers, storage, system files, memory, or recent updates.Open guideCode 10 / Code 43Device Manager cannot start or trust a deviceThese Device Manager clues often point to driver state, USB/device detection, firmware, or hardware communication problems.Open guide
DXGI_ERROR_DEVICE_REMOVEDGPU or DirectX device resetThis gaming error can appear after driver crashes, unstable GPU settings, overheating, or a game/runtime conflict.Open guide
DNS / network errorsNetwork lookup or connection failedNetwork messages should start with adapter, WiFi/Ethernet, router, DNS, and recent VPN/security changes before resets.Open guideSMART / disk errorsStorage warning or failing-drive clueTreat storage warnings as backup-first problems. Do not format, clone, or repair repeatedly before protecting files.Open guideStartup RepairStartup Repair could not repair your PCThis result is a clue, not a final diagnosis. Check recent updates, storage detection, recovery options, and backup status.Open guide
SFC / DISMSystem repair command meaningsUnderstand what SFC and DISM are for before copying commands, and stop before running command chains you do not understand.Open guide0xc0000225Boot files or boot device cannot be foundThis boot clue belongs with boot order, recovery media, storage detection, and recent drive-change checks.Open guide
VIDEO_TDR_FAILUREDisplay driver timeout or GPU resetStart with temperature, recent GPU driver timing, overlays, cable/display clues, and rollback decisions before reinstalling Windows.Open guideGuide library
30 error-code and safe-tool repair paths
Use quick checklists for first response and full guides for deeper Windows update, boot, driver, storage, and blue-screen problems.
01Quick checklist
Windows update error code first response
Record the exact code, update stage, recent changes, storage state, and safe built-in checks before deeper repair.
BeginnerLow risk
Quick checklistOpen guide
02Full guide
0x80070002 explained
Plain-English help for missing or mismatched update files and safe Windows Update cleanup paths.
BeginnerLow risk
Full guideOpen guide
03Full guide
0x80070005 explained
Access-denied update or app action clues, account state, permissions, and security policy checks.
BeginnerLow risk
Full guideOpen guide
04Full guide
0xc000000f boot error explained
Understand boot configuration clues, storage detection, recovery media, and when to avoid repeated restarts.
IntermediateMedium risk
Full guideOpen guide
05Full guide
INACCESSIBLE_BOOT_DEVICE explained
Blue-screen help for storage drivers, firmware mode, drive health, and recent storage changes.
IntermediateHigh risk
Full guideOpen guide
06Full guide
DRIVER_POWER_STATE_FAILURE explained
Understand sleep, shutdown, wake, driver, and power transition clues without installing random driver tools.
BeginnerMedium risk
Full guideOpen guide
07Quick checklist
Boot error codes checklist
Record the code, boot device, recent changes, external devices, and storage sounds before repair attempts.
BeginnerMedium risk
Quick checklistOpen guide
08Quick checklist
Blue screen code checklist
Capture stop code text, recent changes, driver installs, temperatures, and repeat pattern before changing settings.
BeginnerMedium risk
Quick checklistOpen guide
09Quick checklist
Device Manager error codes explained
A future library for common device status codes and safe driver, device, and hardware detection checks.
BeginnerLow risk
Quick checklistOpen guide
10Quick checklist
DirectX and runtime error checklist
Use official runtime installers, Windows Update, game files, and launcher checks instead of random DLL downloads.
BeginnerLow risk
Quick checklistOpen guide
11Quick checklist
Network error checklist
Check router, adapter, IP state, DNS symptoms, VPN, cable, WiFi, and whether other devices work.
BeginnerLow risk
Quick checklistOpen guide
12Quick checklist
Storage error checklist
Record disappearing drives, file errors, clicking sounds, SMART warnings, and backup status before repair attempts.
BeginnerHigh risk
Quick checklistOpen guide
13Quick checklist
Beginner tech glossary
Definitions for BIOS, UEFI, driver, partition, GPT, MBR, Safe Mode, SSD, RAM, GPU, and FPS.
BeginnerLow risk
Quick checklistOpen guide
14Quick checklist
Problem finder tool plan
A guided chooser that routes symptoms to safe first steps and relevant NexyFix guides.
BeginnerLow risk
Quick checklistOpen guide
15Quick checklist
Repair checklist before changing settings
Capture symptoms, backup state, power, recent changes, device model, and what already worked.
BeginnerLow risk
Quick checklistOpen guide
16Quick checklist
Safe command guide for beginners
Explain copy-only commands, administrator terminals, what commands do, and why the site never auto-runs them.
BeginnerMedium risk
Quick checklistOpen guide
17Quick checklist
BIOS terms explained
Define boot order, Secure Boot, TPM, XMP/EXPO, storage mode, CMOS, and firmware reset.
BeginnerMedium risk
Quick checklistOpen guide
18Quick checklist
Driver terms explained
Explain driver, rollback, chipset, device ID, vendor driver, Windows Update driver, and clean install.
BeginnerLow risk
Quick checklistOpen guide
19Quick checklist
Backup checklist before risky fixes
Back up documents, photos, browser data, product keys where applicable, authenticator apps, and recovery codes.
BeginnerHigh risk
Quick checklistOpen guide
20Quick checklist
When to stop troubleshooting
Stop points for heat, burning smell, swollen batteries, clicking storage, liquid damage, repeated shutdowns, or unsafe tools.
BeginnerHigh risk
Quick checklistOpen guide
21Quick checklist
Windows Update log basics
A beginner page for understanding update history and visible error messages without parsing advanced logs first.
IntermediateLow risk
Quick checklistOpen guide
22Quick checklist
Startup Repair result messages explained
Understand common recovery messages and what they suggest about boot files, storage, or recent updates.
IntermediateMedium risk
Quick checklistOpen guide
23Quick checklist
Recovery drive vs installer USB
Compare the purpose of recovery media and installer media so readers pick the right tool.
BeginnerMedium risk
Quick checklistOpen guide
24Quick checklist
System Restore basics
Explain what restore points can and cannot undo and why backups still matter before restore attempts.
BeginnerMedium risk
Quick checklistOpen guide
25Quick checklist
Reset this PC choices explained
Clarify keep-files vs remove-everything choices, app loss, cloud/local reinstall, and backup warnings.
BeginnerHigh risk
Quick checklistOpen guide
26Quick checklist
Safe Mode decision guide
Know when Safe Mode is useful for drivers, apps, malware suspicion, or recent update issues.
BeginnerLow risk
Quick checklistOpen guide
27Quick checklist
SFC and DISM command meanings
Explain what SFC and DISM check, why they may take time, and what they do not fix.
BeginnerMedium risk
Quick checklistOpen guide
28Quick checklist
CHKDSK warning checklist
Explain why disk checks can be risky on failing drives and why backup and symptoms matter first.
IntermediateHigh risk
Quick checklistOpen guide
29Quick checklist
Driver rollback decision guide
Decide when rollback makes sense after a driver update and when official reinstall is safer.
BeginnerMedium risk
Quick checklistOpen guide
30Quick checklist
Error code note-taking template
A simple template for code, exact wording, device model, recent changes, screenshots, and already-tried steps.
BeginnerLow risk
Quick checklistOpen guide