How to Uninstall Windows Defender Manually

Windows Vista is an operating system made by Microsoft which contains a built in malware protection tool called Windows Defender, which can also be downloaded and run as a stand alone service for Windows XP. Windows Defender is a part of the Vista operating system, so it cannot be removed without risking total failure of the operating system. Hence, for Vista users, Defender should be disabled if it's services are not needed. In Windows XP, the stand alone install of Defender can be uninstalled normally.

Uninstalling Defender in Windows XP

Step

Click "Start," then "Control Panel," and double-click "Add/Remove Programs."

Step

Search the list for Windows Defender, and double-click it.

Step

Confirm that you want to remove Windows Defender from your system, and wait for the auto uninstaller to complete.

Step

Restart your computer.

Disabling Windows Defender

Step

Click "Start," then "Control Panel," and double-click on "Windows Defender."

Step

Click on the menu called "Tools," then click "Options," which will appear under a heading called "Settings."

Step

Scroll down to the bottom of the options list, and uncheck the box called "Use Windows Defender."

Step

Click "Save." Windows defender will be disabled; a notification should appear confirming the change.

Disabling Defender's start up process

Step

Click "Start," then click "Run."

Step

Type "msconfig" into the Run field and press "OK." In Vista you can type "msconfig" into the search bar and press "Enter."

Step

Click on the "Startup" tab of the window that opens.

Step

Find Windows Defender in the list, uncheck it, click "Apply," then click "OK." On your next restart, Defender will not boot up.