Windows Defender starts giving out the following error while it tries to start.
Application failed to initialize: 0x800106ba. A problem caused Windows Defender Service to stop. To start the service, restart your computer or search Help and Support on how to start a service manually.
Windows XP
Go to Start
Go to Control Panel
Click Administrative Tools
Windows Vista
Search Start Administrative Tools
Click Administrative Tools
Double click on the Services
Find the windows Defender Service
Double click on it to open Windows Defender Properties
Change the Start up type to Automatic
Click Start button to start the service.
Click Apply Button
Restart the computer.
Now you have fixed the problem that caused Windows Defender to stop running properly.
Windows Defender is software that helps protect your computer against pop-ups, slow performance, and security threats caused by spyware and other unwanted software by detecting and removing known spyware from your computer. Windows Defender features Real-Time Protection, a monitoring system that recommends actions against spyware when it's detected, minimizes interruptions, and helps you stay productive.