Repair Issues with Windows® Defender

Information about Troubleshooting tips for Windows Live® e-mails From New IP.


Windows® Defender is a free security program that helps you stay productive by protecting your Windows® enabled computer against pop-ups, slow performance, and security threats caused by adware, malware, spyware and other unwanted malicious software. This article looks at the repair issues with Windows® Defender.





  • System Restore

  • Windefend Service Patching

  • Startup Error

  • System File Checker (SFC)



System Restore



Windows® Defender has tendency to take few knocks whenever a system restore is applied onto your PC. The system restore is a utility service that can restore you PC to a state exactly like a state recorded in an earlier point of time. However, the system restore does not tend to work very well for the Windows® Defender and almost always causes a few bugs or minor issues to crop up. The bad news is that there are no official fixes or patches for this problem. Repeating a system restore may solve the problem for your system.



Windefend Service Patching



The Windows® Defender runs a service in the background to facilitate working performance. It is associated with a process called ‘MSASCui.exe’. More often than not, the registry parameters for the Windows® Defender service can become faulty and cause problems with smooth functioning of the defender. To resolve this issue, the user would need to stop the service and the associated process by a hard command, and download relevant patches from Microsoft®’s official website and properly update and apply the patches to the system. Once this is done, restart the services and processes. We would recommend you take the help of some professional technical support for this task.



Startup Error


A particular error code known as the “0x800106ba” is common in occurrence in the Windows® Defender on Vista® operating system when trying to change start-up programs. This is caused by an inherent software level design mismatch with the MSE (software explorer). The MSE has been coded to stop Windows® Defender from executing in order to avoid a conflict of operations due to the design flaw. To resolve this issue, you will need to disable the Windows® Defender services on Vista®. If you are running Windows® XP, you will have to completely uninstall the Windows® Defender services. Since this problem is because of a software design flaw, there are currently no available patches for resolution of this problem.


System File Checker (SFC)

The System File Checker (SFC) is like the master reboot option for all Windows® configuration files. It should be used as the last option to protect and restore configuration files in an attempt to solve the Windows® Defender repair problems. SFC is a validation service that induces a sanity check for all system files. It verifies that all the system files are properly placed and in their expected default states. The SFC tries to maintain that all configuration files are free of errors and unchanged. It systematically looks for damaged or replaced system files, and then prompts you to replace any files that do not match the original and intended Windows® files. SFC verifies file versions and repopulates the cache folder. In its working process, the SFC would also fix the Windows® Defender to its original state.




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