Windows Errors

0XC00D28AF

NS_E_DRM_UNABLE_TO_OPEN_PORT: Fix the 0XC00D28AF Error

This Windows error pops up when DRM can't open a port for proximity messages. Usually it's a firewal...

Beginner 👁 30 Aug 3, 2026

0XC00D2799

NS_E_HDS_KEY_MISMATCH (0XC00D2799): Fix in 3 Steps

The DRM license key is out of sync with the media file. Re-download the file or reset Windows Media ...

Beginner 👁 31 Aug 3, 2026

0XC00D2741

Fix NS_E_DRM_INVALID_APPDATA_VERSION (0XC00D2741) on Windows

This DRM error pops up when old Media Player or Silverlight DRM files get corrupted. Reset the DRM f...

Beginner 👁 23 Aug 3, 2026

0X800401F1

Fix CO_E_ALREADYINITIALIZED 0X800401F1 in 5 Minutes

This error means CoInitialize was called twice in the same thread. Here's how to fix it in your code...

Intermediate 👁 38 Aug 3, 2026

0X00002041

Fix ERROR_DS_NO_RESULTS_RETURNED (0X00002041) in AD

Active Directory query returned nothing, usually due to wrong base DN or GC port. Here's how to fix ...

Intermediate 👁 26 Aug 3, 2026

0X00000591

Fix ERROR_DC_NOT_FOUND (0x591) Invalid DC Handle

ERROR_DC_NOT_FOUND happens when Windows can't find a device context handle, often during printing or...

Intermediate 👁 33 Aug 3, 2026

0X800F0248

Fix SPAPI_E_DEVICE_INSTALL_BLOCKED 0x800F0248 Fast

Device install blocked by policy? Here's how to unblock it in minutes, plus why it happens and how t...

Beginner 👁 69 Aug 3, 2026

0XC000011A

Fix STATUS_INVALID_LDT_DESCRIPTOR (0xC000011A) on Windows

This error usually pops up when a program tries to set up LDT descriptors and Windows says no. Most ...

Intermediate 👁 22 Aug 3, 2026

0XC0000245

0xC0000245 Timer Resolution Fix on Windows 10/11

Windows apps crash with STATUS_TIMER_RESOLUTION_NOT_SET when timer APIs are misused. Here's how to f...

Intermediate 👁 31 Aug 3, 2026

0XC00D1BAA

NS_E_BAD_CONTENTEDL Fix: Missing or Corrupt Codec File

NS_E_BAD_CONTENTEDL shows up when Windows Media Player hits a broken codec config. Usually a bad Win...

Beginner 👁 28 Aug 3, 2026

0X00000564

Fix ERROR_LOGON_NOT_GRANTED (0x564): Wrong Logon Type

This error means your account isn't allowed to log on that way (e.g., over network). Fix by changing...

Intermediate 👁 25 Aug 3, 2026

0X000020CC

Fix ERROR_DS_RECALCSCHEMA_FAILED 0x20CC in Active Directory

Schema update fails when AD can't recalc the validation cache. Force a schema refresh and check FSMO...

Advanced 👁 27 Aug 3, 2026

0XC01E0331

Fix 0xC01E0331 Video Source ID Conflict in Windows

Video present source ID conflict usually from stale GPU drivers or multiple display adapters. We'll ...

Intermediate 👁 24 Aug 3, 2026

0X00000530

Fix 0x530 Logon Hours Restriction: Step-by-Step

Account logon hours restriction blocks login outside allowed times. Check AD user hours, then local ...

Beginner 👁 37 Aug 2, 2026

0XC0140017

Fix ACPI Mutex Not Owner 0XC0140017 in Windows

Windows error 0XC0140017 means a driver tried to grab a mutex it doesn't own. Mostly tied to ACPI or...

Intermediate 👁 30 Aug 2, 2026

0X00003AFF

Fix ERROR_MUI_INVALID_LOCALE_NAME (0X00003AFF) in 5 Steps

This error means a Windows language pack or app manifest has a bad culture name. Fix it by reinstall...

Intermediate 👁 34 Aug 2, 2026

0XC019003C

STATUS_ROLLBACK_TIMER_EXPIRED 0XC019003C Fix: Windows Update Rollback

Windows Update fails with rollback timer expired. Usually a driver or pending reboot issue. Here's h...

Intermediate 👁 27 Aug 2, 2026

0X0000206F

Fix ERROR_DS_ATT_NOT_DEF_IN_SCHEMA (0x206F) Fast

Active Directory can't find an attribute in the schema. Usually a replication lag or a bad schema ex...

Beginner 👁 24 Aug 2, 2026

0X00000101

STATUS_ALERTED 0x101: What It Means and How to Fix It

STATUS_ALERTED means a thread woke up early from a delay due to an alert. Usually harmless, but can ...

Beginner 👁 45 Aug 2, 2026

0X0000029F

Fix ERROR_PNP_BAD_MPS_TABLE (0x29F) in Windows BIOS

Error 0x29F means a device is missing from the BIOS MPS table. Fix it by updating BIOS or toggling M...

Intermediate 👁 46 Aug 2, 2026

0XC0000054

Fix 0XC0000054 File Lock Conflict in Windows 10/11

This error means a program can't read or write a file because another program locked it. Here's how ...

Beginner 👁 83 Aug 2, 2026

0XC0220029

Fix STATUS_FWP_RESERVED 0xC0220029 Fast

Windows firewall or VPN error when a reserved WFP field isn't zero. Usually a driver or policy glitc...

Intermediate 👁 40 Aug 2, 2026

0XC0262506

Fix ERROR_GRAPHICS_PVP_NO_DISPLAY_DEVICE 0XC0262506

This Windows graphics error usually pops up when a GPU driver or display adapter goes missing after ...

Intermediate 👁 28 Aug 2, 2026

0XC0000712

Fix 0xC0000712 Protected Process Error on Windows 10/11

Windows throws 0xC0000712 when you try to debug or terminate a protected process. This guide walks t...

Intermediate 👁 35 Aug 1, 2026