- \n
- How to schedule task to definition update on Microsoft Defender<\/a><\/li>\n
- How to update definitions with Command Prompt on Microsoft Defender<\/a><\/li>\n<\/ul>\n
How to schedule task to definition update on Microsoft Defender<\/h2>\n
To create a scheduled task to update Microsoft Defender Antivirus definitions, use these steps:<\/p>\n
- \n
- \n
Open Start<\/strong>.<\/p>\n<\/li>\n
- \n
Search for\u00a0Task Scheduler<\/strong> and click the top result to open the experience.<\/p>\n<\/li>\n
- \n
Right-click the Task Scheduler Library<\/strong> folder.<\/p>\n<\/li>\n
- \n
Click the\u00a0New Folder<\/strong> option.<\/p>\n<\/li>\n
- \n
Type any name for the folder and click the OK <\/strong>button. (We’re creating a new folder to keep tasks organized and separated from the system tasks.)<\/p>\n<\/li>\n
- \n
Right-click the recently created folder, and select the\u00a0Create Task <\/strong>option.<\/p>\n
![\"Task](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/create-new-task-schedule.jpg?resize=827%2C495&quality=78&strip=all&ssl=1\")
Task Scheduler create new task<\/figcaption><\/figure>\n<\/li>\n - \n
In the “Name” box, enter a name for the task.<\/p>\n<\/li>\n
- \n
In the “General” tab, under the “Security options” section, select the Run whether user is logged on or not<\/strong> option. (This is the option that will make the command window not to appear when the task runs automatically.)<\/p>\n
![\"Task](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/task-general-settings.jpg?resize=632%2C542&quality=78&strip=all&ssl=1\")
Task general settings<\/figcaption><\/figure>\n<\/li>\n - \n
Clear the\u00a0Do not store password<\/strong> option.<\/p>\n<\/li>\n
- \n
Click the “Triggers” tab, and click the New<\/strong> button.<\/p>\n<\/li>\n
- \n
Using the “Begin the task” drop-down menu, select the\u00a0On a schedule <\/strong>option.<\/p>\n
![\"Task](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/task-trigger-daily.jpg?resize=591%2C617&quality=78&strip=all&ssl=1\")
Task Scheduler trigger settings<\/figcaption><\/figure>\n<\/li>\n - \n
Under the “Settings” section, select the Daily<\/strong> option.<\/p>\n<\/li>\n
- \n
Specify the Start<\/strong> settings on the right side.<\/p>\n<\/li>\n
- \n
Click the\u00a0OK <\/strong>button.<\/p>\n<\/li>\n
- \n
Click the “Actions” tab.<\/p>\n<\/li>\n
- \n
Click the New<\/strong> Button.<\/p>\n<\/li>\n
- \n
Using the “Actions” drop-down menu, select the\u00a0Start a program\u00a0<\/strong>option.<\/p>\n<\/li>\n
- \n
In the “Program\/script” box, type the following command:<\/p>\n
\"%ProgramFiles%\\Windows Defender\\MpCmdRun.exe\"<\/pre>\n<\/li>\n
- \n
In the “Add arguments” box, type the following command and click the\u00a0OK <\/strong>button.<\/p>\n
-removedefinitions -dynamicsignatures<\/pre>\n
![\"Microsoft](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/task-action-defender-clear-command.jpg?resize=501%2C551&quality=78&strip=all&ssl=1\")
Microsoft Defender clear definition cache<\/figcaption><\/figure>\n<\/li>\n - \n
Click the OK<\/strong> button.<\/p>\n<\/li>\n
- \n
Click the New<\/strong> button again in the “Actions tab.<\/p>\n<\/li>\n
- \n
In the “Program\/script” box, type the following command:<\/p>\n
\"%ProgramFiles%\\Windows Defender\\MpCmdRun.exe\"<\/pre>\n<\/li>\n
- \n
In the “Add arguments” box, type the following command and click the\u00a0OK <\/strong>button:<\/p>\n
-SignatureUpdate<\/pre>\n
![\"Microsoft](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/defener-definition-update-command.jpg?resize=501%2C551&quality=78&strip=all&ssl=1\")
Microsoft Defender update command<\/figcaption><\/figure>\n<\/li>\n - \n
Click the “Settings” tab.<\/p>\n<\/li>\n
- \n
Check the following options:<\/p>\n
- \n
- Allow task to be run on demand.<\/li>\n
- Run task as soon as possible after a scheduled start missed.<\/li>\n
- If the task fails, restart every. (Adjust as necessary.)<\/li>\n<\/ul>\n<\/li>\n
- \n
Click the\u00a0OK <\/strong>button.<\/p>\n
![\"Task](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/task-schedule-behavior-settings.jpg?resize=632%2C542&quality=78&strip=all&ssl=1\")
Task Scheduler additional settings<\/figcaption><\/figure>\n<\/li>\n - \n
If prompted, enter your administrative username and password.<\/p>\n<\/li>\n
- \n
Click the\u00a0OK <\/strong>button.<\/p>\n<\/li>\n<\/ol>\n
Once you complete the steps, the commands will run on the schedule you specified to update the Microsoft Defender Antivirus.<\/p>\n
How to update definitions with Command Prompt on Microsoft Defender<\/h2>\n
If you want to update definitions without using Task Scheduler, the following instructions will help you to complete the task.<\/p>\n
To update Microsoft Defender Antivirus definitions manually using Command Prompt, use these steps:<\/p>\n
- \n
- \n
Open Start<\/strong>.<\/p>\n<\/li>\n
- \n
Search for Command Prompt<\/strong> and click the top result to open the experience.<\/p>\n<\/li>\n
- \n
Type the following command to clear the antivirus program cache and press Enter<\/strong>:<\/p>\n
\"%ProgramFiles%\\Windows Defender\\MpCmdRun.exe\" -removedefinitions -dynamicsignatures<\/pre>\n
![\"Microsoft](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/defender-clear-definition-cmd.jpg?resize=827%2C394&quality=78&strip=all&ssl=1\")
Microsoft Defender clean definition cache command<\/figcaption><\/figure>\n<\/li>\n - \n
Type the following command to update Microsoft Defender Antivirus definition and press Enter<\/strong>:<\/p>\n
\"%ProgramFiles%\\Windows Defender\\MpCmdRun.exe\" -SignatureUpdate<\/pre>\n
![\"Microsoft](\"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/microsoft-defender-update-defition-cmd.jpg?resize=827%2C254&quality=78&strip=all&ssl=1\")
Microsoft Defender update definition with Command Prompt<\/figcaption><\/figure>\n<\/li>\n<\/ol>\n After you complete the steps, Microsoft Defender Antivirus will contact the update servers to download and install the latest definition updates.<\/p>\n","protected":false},"excerpt":{"rendered":"
Yes, you can update Microsoft Defender Antivirus using a custom schedule, and here’s how on Windows 10.<\/p>\n","protected":false},"author":2,"featured_media":123242,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"jetpack_post_was_ever_published":false,"footnotes":""},"categories":[23],"tags":[677,96,19,2703,2540,2576],"class_list":["post-123211","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-windows","tag-antivirus","tag-difficulty-level-intermediate","tag-how-to","tag-microsoft-defender","tag-windows-10","tag-windows-help"],"yoast_head":"\n
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With over 21 years as a technology writer and IT Specialist, Mauro specializes in Windows, software, and cross-platform systems such as Linux, Android, and macOS. Certifications he holds include Microsoft Certified Solutions Associate (MCSA), Cisco Certified Network Professional (CCNP), VMware Certified Professional (VCP), and CompTIA A+ and Network+. Mauro is a recognized Microsoft MVP and has also been a long-time contributor to Windows Central. You can follow him on YouTube, Threads, BlueSky, X (Twitter), LinkedIn and About.me. Email him at Contact@Pureinfotech.com.","sameAs":["https:\/\/pureinfotech.com","https:\/\/x.com\/@Pureinfotech"],"url":"https:\/\/pureinfotech.com\/mauro-huculak"}]}},"jetpack_featured_media_url":"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2020\/05\/microsoft-defender-custom-task-schedule.jpg?fit=1680%2C1050&quality=78&strip=all&ssl=1","jetpack-related-posts":[{"id":71651,"url":"https:\/\/pureinfotech.com\/malware-protection-periodic-scanning-windows-10\/","url_meta":{"origin":123211,"position":0},"title":"How to enable Defender Antivirus Periodic scanning on Windows 10","author":"Mauro Huculak","date":"January 23, 2024","format":false,"excerpt":"Periodic scanning on Microsoft Defender Antivirus helps you to detect and remove malware when using a third-party antivirus, and here's how to use it.","rel":"","context":"","block_context":{"text":"Features","link":"https:\/\/pureinfotech.com\/category\/features\/"},"img":{"alt_text":"Microsoft Defender Antivirus Periodic 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Here\u2019s how I installed Windows 11 without it using an answer file \u2013 It's easier than you think.","rel":"","context":"","block_context":{"text":"Features","link":"https:\/\/pureinfotech.com\/category\/features\/"},"img":{"alt_text":"Windows 11 without Defender Antivirus","src":"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/windows-11-install-no-defender-antivirus-hero.webp?fit=1200%2C750&quality=78&strip=all&ssl=1&resize=350%2C200","width":350,"height":200,"srcset":"https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/windows-11-install-no-defender-antivirus-hero.webp?fit=1200%2C750&quality=78&strip=all&ssl=1&resize=350%2C200 1x, https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/windows-11-install-no-defender-antivirus-hero.webp?fit=1200%2C750&quality=78&strip=all&ssl=1&resize=525%2C300 1.5x, https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/windows-11-install-no-defender-antivirus-hero.webp?fit=1200%2C750&quality=78&strip=all&ssl=1&resize=700%2C400 2x, https:\/\/i0.wp.com\/pureinfotech.com\/wp-content\/uploads\/2025\/06\/windows-11-install-no-defender-antivirus-hero.webp?fit=1200%2C750&quality=78&strip=all&ssl=1&resize=1050%2C600 3x"},"classes":[]}],"_links":{"self":[{"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/posts\/123211","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/comments?post=123211"}],"version-history":[{"count":0,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/posts\/123211\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/media\/123242"}],"wp:attachment":[{"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/media?parent=123211"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/categories?post=123211"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/pureinfotech.com\/wp-json\/wp\/v2\/tags?post=123211"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}} - \n
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- How to update definitions with Command Prompt on Microsoft Defender<\/a><\/li>\n<\/ul>\n