This list of Windows Defender Error Codes, Message displayed, Reasons & suggestions for Resolutions, Event IDs which will help you troubleshoot Windows Defender errors on Windows 10.

0x80508007 ERR_MP_NO_MEMORY

0x8050800C ERR_MP_BAD_INPUT_DATA

0x80508020 ERR_MP_BAD_CONFIGURATION

0x805080211 ERR_MP_QUARANTINE_FAILED

0x80508022 ERR_MP_REBOOT_REQUIRED

0x80508023 ERR_MP_THREAT_NOT_FOUND

0x80508024 ERR_MP_FULL_SCAN_REQUIRED

0x80508025 ERR_MP_MANUAL_STEPS_REQUIRED

0x80508026 ERR_MP_REMOVE_NOT_SUPPORTED

0x80508027 ERR_MP_REMOVE_LOW_MEDIUM_DISABLED

0x80508029 ERROR_MP_RESCAN_REQUIRED

0x80508030 ERROR_MP_CALLISTO_REQUIRED

0x80508031 ERROR_MP_PLATFORM_OUTDATED

0x80501004 ERROR_MP_NO_INTERNET_CONN

0x80501000 ERROR_MP_UI_CONSOLIDATION_BASE

0x80501001 ERROR_MP_ACTIONS_FAILED

0x80501002 ERROR_MP_NOENGINE

0x80501003 ERROR_MP_ACTIVE_THREATS

0x805011011 MP_ERROR_CODE_LUA_CANCELLED

0x80501101 ERROR_LUA_CANCELLATION

0x80501102 MP_ERROR_CODE_ALREADY_SHUTDOWN

0x80501103 MP_ERROR_CODE_RDEVICE_S_ASYNC_CALL_PENDING

0x80501104 MP_ERROR_CODE_CANCELLED

0x80501105 MP_ERROR_CODE_NO_TARGETOS

0x80501106 MP_ERROR_CODE_BAD_REGEXP

0x80501107 MP_ERROR_TEST_INDUCED_ERROR

0x80501108 MP_ERROR_SIG_BACKUP_DISABLED

0x80508001 ERR_MP_BAD_INIT_MODULES

0x80508002 ERR_MP_BAD_DATABASE

0x80508004 ERR_MP_BAD_UFS

0x8050800C ERR_MP_BAD_INPUT_DATA

0x8050800D ERR_MP_BAD_GLOBAL_STORAGE

0x8050800E ERR_MP_OBSOLETE

0x8050800F ERR_MP_NOT_SUPPORTED

0x8050800F 0x80508010 ERR_MP_NO_MORE_ITEMS

0x80508011 ERR_MP_DUPLICATE_SCANID

0x80508012 ERR_MP_BAD_SCANID

0x80508013 ERR_MP_BAD_USERDB_VERSION

0x80508014 ERR_MP_RESTORE_FAILED

0x80508016 ERR_MP_BAD_ACTION

0x80508019 ERR_MP_NOT_FOUND

0x80509001 ERR_RELO_BAD_EHANDLE+

0x80509003 ERR_RELO_KERNEL_NOT_LOADED

0x8050A001 ERR_MP_BADDB_OPEN

0x8050A002 ERR_MP_BADDB_HEADER

0x8050A003 ERR_MP_BADDB_OLDENGINE

0x8050A004 ERR_MP_BADDB_CONTENT

0x8050A005 ERR_MP_BADDB_NOTSIGNED

0x8050801 ERR_MP_REMOVE_FAILED

0x80508018 ERR_MP_SCAN_ABORTED

You can also check the Event Log IDs along with the message descriptions in the Event Logs.

For more details about Windows Defender client error codes, internal as ell as external, and Event Log IDs, visit Microsoft.com.

If you are looking for specific troubleshooting suggestions, follow these links:

If you are looking for specific troubleshooting suggestions, follow these links:

Windows Defender Error Code 0x800106ba Application failed to initialize
Windows Defender is turned off or not working
Windows Defender will not turn off even when 3rd party AntiVirus is installed
Unable to turn on Windows Defender
Error 0x800106a, Windows Defender will not turn on
Windows Defender will not update definitions
Windows failed to install the following update with error 0x80070643
Error 0x80508020, 0x800705b4 for Windows Defender
Windows Defender Error 577 Cannot verify digital signal
Windows Defender PC status Potentially unprotected
Error 0x80080015, The Activation Requires A Display Name To Be Present Under The CLSID Key
Windows Defender Error MSASCui.exe Unable To Locate Component.