How to Remove Microsoft Security – Manually Uninstall Microsoft Security Essentials
This section explains how to remove Microsoft security, that is, how to uninstall Microsoft Security Essentials if you are unable to reinstall it after deleting the above mentioned registry key.
Sometimes, you may get Microsoft Security Essentials Installation Error when you try to reinstall it after deleting the registry key mentioned in first section. In such case, click on the My Computer in Regedit Window and hit F3. In the text box, type Microsoft Security Essentials and press F3 again (See figure). This is actually a search tool that helps you find all instances of MSE in the system registry. Press F3 to locate the next instance after you delete each key. Keep on searching for all instances of MSE and delete each key that contains reference to Microsoft Security Essentials (includes Windows Startup items). After deleting all the Microsoft Security Essentials keys from the Windows Registry, close the Windows Registry Editor. From here, follow the given steps carefully - to remove Microsoft Security:
-->If you are working on Windows Vista or Windows 7, browse to the following directory and copy the mseInstall.log to some secure place:
C:\ProgramData\Microsoft\Microsoft Security Essentials\Support
Come back to C:\ProgramData\Microsoft and delete the folder Microsoft Security Essentials.
-->If you are working on Windows XP, you will find msseInstall.log on the following path:
C: \Documents and Settings\All Users\Application Data\Microsoft\Microsoft Security Essentials\Support
After copying the log, delete the Microsoft Security Essentials folder. This is how to uninstall Microsoft Security Essentials in case you are not able to uninstall MSE using Add/Remove Programs.
Why Did We Save the Log File: Now that you know how to remove Microsoft Security, you may want to install some other antivirus! If the installation creates problem, it may mean that that parts of MSE are still resident on your computer. To make sure, you need to contact MSE customer care. They may ask you for the log file before helping you. This is why we save the log.
Also See: MSE versus AVG