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Disable Defender Antivirus scheduled scan task

Overview​

About this script

This script improves your privacy on Windows.

These changes use Windows system commands to update your settings.

This script disables the Defender Antivirus scheduled scan scheduled task.

Microsoft refers to this task as:

  • Windows Defender Scheduled Scan 1 2 3 4 5
  • Periodic scan task 3 4 6

This task is a component of Defender Antivirus 1 2 6. It performs automatic regular antivirus scans 1 6.

Disabling this task may enhance your privacy by giving you more control over when and how often your system is scanned. It may also improve system performance by reducing background processes.

However, regular scans are a key part of maintaining system security. Disabling this task means your computer will not automatically perform scheduled antivirus scans, which may leave your system more vulnerable to malware if you don't manually run scans regularly.

Caution

This action may leave your computer more vulnerable to malware if you don't follow good security practices or manually run antivirus scans regularly.

Technical Details​

This task executes the following command:
%PROGRAMFILES\Windows Defender\MpCmdRun.exe Scan -ScheduleJob -ScanTrigger 55 2 3 4. The MpCmdRun.exe is a command-line tool used for various Defender Antivirus functions 5.

Overview of default task statuses​

\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan 2 3 4 6:

OS VersionDefault status
Windows 10 22H2🟢 Ready
Windows 11 22H2🟢 Ready

This script uses Batch (batchfile) scripting language.

Not Advised

This script should only be used by advanced users. This script is not recommended for daily use as it breaks important functionality. Do not run it without having backups and system snapshots.

Implementation Details

  • Language: batch

  • Required Privileges: Administrator rights

  • Compatibility: Windows only

  • Reversibility: Can be undone using provided revert script

Explore Categories​

This action belongs to Disable Defender Antivirus scheduled tasks category. This category contains scripts to disable maintenance tasks of Defender Antivirus. Scheduled tasks are automated operations that Windows runs at specific times or events. Defender uses these tasks to maintain its antivirus service. Disabling these tasks enhances privacy by: Stopping... Read more on category page ▶

Apply now​

Choose one of three ways to apply:

  1. Automatically via privacy.sexy: The easiest and safest option.
  2. Manually by downloading: Requires downloading a file.
  3. Manually by copying: Advanced flexibility.

Alternative 1. Apply with Privacy.sexy​

privacy.sexy is free and open-source application that lets securely apply this action easily.

Open privacy.sexy

You can fully restore this action (revert back to the original behavior) using the application.

privacy.sexy instructions
  1. Open or download the desktop application
  2. Search for the script name: Disable Defender Antivirus scheduled scan task.
  3. Check the script by clicking on the checkbox.
  4. Click on Run button at the bottom of the page.

Alternative 2. Download​

Irreversible Changes

This script is irreversible, meaning there is no straightforward method to restore changes once applied. Exercise caution before running, restoring it may not be possible.

  1. Download the script file by clicking on the button below:

    Download script

  2. Run the script file by clicking on it.

Download revert script​

This file restores your system to its original state, before this script is applied.

Download restore script

Alternative 3. Copy​

This is for advanced users. Consider automatically applying or downloading the script for simpler way.

  1. Open Command Prompt as administrator.
HELP: Step-by-step guide

  1. Click on Start menu

  2. Type cmd

  3. Right click on Command Prompt select Run as administrator

  4. Click on Yes to run Command Prompt

Animation showing how to open terminal as administrator on Windows 11

  1. Copy the following code:
Code to apply changes
:: Disable scheduled task(s): `\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Microsoft\Windows\Windows Defender\'; $taskNamePattern='Windows Defender Scheduled Scan'; Write-Output "^""Disabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Output "^""Skipping, no tasks matching pattern `"^""$taskNamePattern`"^"" found, no action needed."^""; exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; try { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } catch { Write-Error "^""Failed to disable task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to disable some tasks. Check error messages above.'; exit 1; }"
  1. Right click on command prompt to paste it.
  2. Press Enter to apply remaining code.

Copy restore code​

Copy and run the following code to restore changes:

Revert code
:: Restore scheduled task(s) to default state: `\Microsoft\Windows\Windows Defender\Windows Defender Scheduled Scan`
PowerShell -ExecutionPolicy Unrestricted -Command "$taskPathPattern='\Microsoft\Windows\Windows Defender\'; $taskNamePattern='Windows Defender Scheduled Scan'; $shouldDisable =  $false; Write-Output "^""Enabling tasks matching pattern `"^""$taskNamePattern`"^""."^""; $tasks = @(Get-ScheduledTask -TaskPath $taskPathPattern -TaskName $taskNamePattern -ErrorAction Ignore); if (-Not $tasks) { Write-Warning ( "^""Missing task: Cannot enable, no tasks matching pattern `"^""$taskNamePattern`"^"" found."^"" + "^"" This task appears to be not included in this version of Windows."^"" ); exit 0; }; $operationFailed = $false; foreach ($task in $tasks) { $taskName = $task.TaskName; if ($shouldDisable) { if ($task.State -eq [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already disabled, no action needed."^""; continue; }; } else { if (($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Disabled) -and ($task.State -ne [Microsoft.PowerShell.Cmdletization.GeneratedTypes.ScheduledTask.StateEnum]::Unknown)) { Write-Output "^""Skipping, task `"^""$taskName`"^"" is already enabled, no action needed."^""; continue; }; }; try { if ($shouldDisable) { $task | Disable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully disabled task `"^""$taskName`"^""."^""; } else { $task | Enable-ScheduledTask -ErrorAction Stop | Out-Null; Write-Output "^""Successfully enabled task `"^""$taskName`"^""."^""; }; } catch { Write-Error "^""Failed to restore task `"^""$taskName`"^"": $($_.Exception.Message)"^""; $operationFailed = $true; }; }; if ($operationFailed) { Write-Output 'Failed to restore some tasks. Check error messages above.'; exit 1; }"

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