Since Windows Vista, your operating system comes with an anti spyware program called Windows Defender. It’s a small piece of software that runs in the background to help protect your computer from various pieces of spyware và malicious software. Defender has been around since 2006 and although not a fully featured security application, it does at least offer some protection for Windows Vista and 7 out-of-the-box. In Windows 8, Microsoft went a step further basically renaming Microsoft Security Essentials lớn Defender, & it’s now an antivirus package as opposed to just small resident anti spyware tool.The problem with all Defender versions in Windows Vista and above is it’s integrated into the operating system & installs by mặc định with no visible or hidden option to uninstall. Many people are looking for ways to lớn disable, uninstall or remove it from their system as they prefer lớn use other software. Windows XP users at least have the luxury of choosing whether they want to tải về and install Defender in the first place as it’s a separate package, & then have the option khổng lồ uninstall again through địa chỉ cửa hàng or Remove Programs.

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Luckily most of the time when you install a new anti spyware program or antivirus application that includes anti spyware, it should be smart enough khổng lồ disable Windows Defender as your new software takes care of it from now on. However, if Defender is still running or causing other issues, you need khổng lồ know how to turn it off manually or in more extreme cases remove it from the system completely. Here we show you how to vì chưng both.


Disabling Defender in Windows Vista & 7

Defender in Windows Vista is slightly more integrated into the operating system as opposed khổng lồ Windows 7 with added options for protecting mạng internet Explorer, startup items and services/drivers etc. It also includes a tray icon for the program which is started with Windows that needs to be removed. There are two easy ways khổng lồ disable Defender in Windows 7 & Vista:

Method #1

1. Click Start và type services.msc into the search box, or go khổng lồ Control Panel -> Administrative Tools -> Services.

2. Look for “Windows Defender” in the services list và double click on it lớn bring up the Properties window.


3. Click the Stop button to lớn stop the Windows Defender service and then click on the Startup type drop down menu & select Disabled. Press OK.


Method #2

1. This way is just as easy, go to lớn Control Panel -> Windows Defender, or if it’s running in the tray under Vista, simply double click on the tray icon.

2. Click on Tools & then go lớn Options.


3a. In Windows Vista scroll right to the bottom of the window and you’ll see an option “Use Windows Defender” under Administrator options. Simply uncheck “Use Windows Defender” & click Save, Defender will now be turned off.


3b. Defender is laid out slightly differently in Windows 7. In the Options window, click on Administrator down the left và then uncheck “Use this program” và click Save.


Removing the Startup Entry

If you stop và disable Vista’s Windows Defender from Services and do not disable the Windows Defender tray program (MSASCui.exe) from starting with Windows, you’ll likely get the following error message:

Application failed to lớn initialized: 0x800106ba. A problem caused this program’s service lớn stop. To start the service, restart your computer or tìm kiếm Help and tư vấn for how lớn start a service manually.


1. Click Start và type msconfig into the tìm kiếm box.

2. Go lớn the Startup tab và uncheck Windows Defender displayed in the Startup sản phẩm column. Click OK và at the restart box check “Don’t show this message again” and then click “Exit without restart”.

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Of course, there are many other tools around that can disable Windows startup entries such as CCleaner which you can use instead if you wish.

Disabling Windows Defender in Windows 8

As we mentioned above, Windows 8 Defender is now pretty much the full Microsoft Security Essentials antivirus software under the Defender name. It can also be disabled using two methods which are basically the same as for Windows Vista and 7. The first method of disabling the Windows Defender service is exactly the same as Method #1 above, the second is slightly different because of the MSE looking interface.

1. Go khổng lồ Control Panel -> Windows Defender or click on the Start Screen -> right click -> All Apps -> Windows Defender.


2. Click on the Settings tab -> click Administrator on the left, & then uncheck the “Turn on Windows Defender” box & save the changes.


Completely Uninstalling Windows Defender

For most users, simply turning off Windows Defender or disabling it via the Services Control Panel should be enough to stop it running. If for whatever reason you’re still having some sort of issue or are determined khổng lồ remove Defender completely from the system, unfortunately is isn’t possible using Programs and Features or the Turn Windows features on or off window.

Although there is no official way to lớn cleanly uninstall Defender, it is possible khổng lồ remove the service, Control Panel entry, other related registry entries & all the files and folders manually so Defender is unofficially removed from the system. This does present its own phối of problems though as the registry keys, files và folders are all protected with enhanced permissions & you have to lớn take ownership of them all. Also, once removed, you can’t re-install Defender again because it isn’t a separate package.

As there seems khổng lồ be no tool around to vày it for you, we’ve decided khổng lồ create our own little utility that can delete all the necessary protected registry keys, files and folders at the click of a button. Currently the program works great on Windows Vista and 7’s Defender but does not work and shouldn’t be used on Windows 8, we may include full Windows 8 Defender support in future if people request it.


Simply download the portable Windows Defender Uninstaller và run it, then click the button lớn uninstall Defender. The lower pane will show what’s being deleted & if there are any errors. For best results, it’s best khổng lồ disable Defender beforehand using one of the methods above. Please use this tool at your own risk as once Defender has been removed, it cannot easily be re-installed, make sure you have backups to hand in case you change your mind later on.

Manually Removing Defender

For the more experienced, removing the Windows Defender service, files, folders and Control Panel entry can be done manually, but as they’re all protected, you need lớn know how lớn delete a protected registry key and how lớn take ownership of folders with a tool like WinOwnership or the Take Ownership context menu.

1. Open a command Prompt and type the following lớn stop & then delete the Defender service:

sc stop windefend

sc delete windefend


2. Next you need lớn grant full permissions to and delete the following registry key so the Defender Control Panel entry can be deleted:


3. Also grant full permission & delete the Defender program registry key:


4. Now take ownership of và delete the following folders:

C:Program FilesWindows Defender

C:ProgramDataMicrosoftWindows Defender

C:Program Files (x86)Windows Defender (for 64-bit users only)

After that is done, Defender should now be removed. Windows may complain that Defender is turned off but this will disappear after a reboot or you can go into action Center và tell it not to monitor your anti spyware software.


Of course we don’t recommend disabling or uninstalling Windows Defender for the sake of it, especially if it’s causing you no issues or there is no specific need to bởi so. Disabling Windows Defender will leave your computer unprotected from spyware and other malware, so you obviously need khổng lồ make sure you have another anti spyware program or security package to lớn replace it.