Windows Errors

0XC0140015

STATUS_ACPI_INVALID_MUTEX_LEVEL: Fix Mutex Error 0xC0140015

An ACPI mutex level mismatch stops Windows from booting or loading drivers. We'll walk through fixes...

Intermediate 👁 38 May 28, 2026

0X000004DE

ERROR_CONTINUE 0X000004DE: What It Means and How to Fix

A benign status code from the Windows kernel saying 'keep going.' Rarely a real problem, but if you ...

Beginner 👁 34 May 28, 2026

0X8011040B

COMADMIN_E_APPLICATIONEXISTS (0X8011040B) Fix – App Already Installed

COM+ app won't install because it's already registered. Delete the orphaned entry via Component Serv...

Intermediate 👁 32 May 28, 2026

0X00000544

Fix ERROR_BAD_VALIDATION_CLASS (0X00000544) on Windows

A validation class error that usually pops up during driver installs or system updates. Here's how t...

Intermediate 👁 37 May 28, 2026

0X0000066B

Fix ERROR_PATCH_PACKAGE_REJECTED (0X0000066B) Fast

Windows won't install an update because a software restriction policy blocks it. Here's how to check...

Intermediate 👁 37 May 28, 2026

0XC00D28B3

NS_E_DRM_EXPIRED_LICENSEBLOB (0XC00D28B3) – Cardea License Expired Fix

This error shows your DRM license for a Silverlight or old media file has expired. The fix is simple...

Intermediate 👁 39 May 28, 2026

0XC00D135B

Fix NS_E_TRACK_DOWNLOAD_REQUIRES_ALBUM_PURCHASE (0XC00D135B)

This error means Windows Media Player or a music app won't let you download a single track—you gotta...

Beginner 👁 30 May 28, 2026

0X00000480

Fix 0x80000480: Only One Instance of This Program Can Run

Windows says you can only run one copy of a program. Mutex lock is stuck. We'll kill the ghost proce...

Intermediate 👁 141 May 28, 2026

0X00002168

Fix ERROR_DS_SOURCE_AUDITING_NOT_ENABLED (0X00002168) Fast

This error means source domain auditing is off for a cross-domain operation. You'll need to enable i...

Intermediate 👁 39 May 28, 2026

0X400D2F01

NS_I_NOLOG_STOP (0X400D2F01) on IIS Startup — What Forces a Pending Header Switch

Shows during IIS reset or HTTP.sys startup when a log file switch is queued but can't complete. It's...

Intermediate 👁 30 May 28, 2026

0X000036E1

Fix ERROR_SXS_XML_E_INVALID_UNICODE (0x000036E1) Manifest Error

This error means a manifest file has a bad Unicode character. It usually hits during app installs or...

Intermediate 👁 44 May 28, 2026

0XC00A000D

STATUS_CTX_MODEM_RESPONSE_NO_DIALTONE (0xC00A000D) Fix

Your modem didn't hear a dial tone. Happens with old phone lines or misconfigured Remote Desktop set...

Intermediate 👁 31 May 28, 2026

0XC0000708

STATUS_RESOURCE_IN_USE (0xC0000708) – Quick Fix & Why It Works

This error means something you're trying to open is already locked by another process. Here's how to...

Intermediate 👁 47 May 28, 2026

0X80110815

COMADMIN_E_PROGIDINUSEBYCLSID (0X80110815) Fix: COM+ Copy Error

This COM+ error pops up when copying a component and the ProgID's already tied to another CLSID. Her...

Intermediate 👁 35 May 28, 2026

0X000019EE

0X000019EE: Log Full Handler Already Running

This error means the system already triggered a log full handler, so your request to handle it again...

Intermediate 👁 48 May 28, 2026

0X80000023

0X80000023 Fix: Redirector in Use Can't Unload

This error pops up when Windows can't unload the redirector layer because files or printers are stil...

Intermediate 👁 35 May 28, 2026

0XC00D2AFB

NS_E_REBOOT_REQUIRED (0XC00D2AFB) Fix That Actually Works

That 'Installation was not successful' error? Usually means Windows Media Player or a codec pack nee...

Beginner 👁 36 May 28, 2026

0XC0000218

0XC0000218: Registry Hive Won't Load After Bad Shutdown or Disk Error

Windows can't boot because the registry hive file is corrupt or missing. This usually happens after ...

Intermediate 👁 77 May 28, 2026

0X00000302

Fix ERROR_CANTFETCHBACKWARDS 0X00000302 in ODBC apps

Your program tried to scroll backwards through query results, but the data provider doesn't support ...

Intermediate 👁 37 May 28, 2026

0X000020D0

AD Schema Syntax Error 0X000020D0 Fix

Active Directory schema syntax mismatch usually from bad imports or schema updates. Fix it by checki...

Intermediate 👁 42 May 28, 2026

0X00002128

Fixing ERROR_DS_SRC_GUID_MISMATCH (0X00002128)

This error happens when Active Directory can't match the source object's GUID during a cross-domain ...

Advanced 👁 32 May 28, 2026

0XC00D280E

Fix NS_E_DRM_SOURCEID_NOT_SUPPORTED (0XC00D280E) in Windows Media Player

Your media file uses an old DRM scheme Windows Media Player no longer supports. Upgrade to VLC or us...

Intermediate 👁 43 May 28, 2026

0X00000580

0x580 Invalid Window Belongs to Other Thread Fix

You'll see this when a window handle gets passed to the wrong thread. Quick reset usually fixes it; ...

Intermediate 👁 38 May 28, 2026

0X00003718

Fix ERROR_SXS_FILE_NOT_PART_OF_ASSEMBLY 0X00003718

This error means Windows can't find a file it expects inside a side-by-side assembly. Usually happen...

Intermediate 👁 29 May 28, 2026