This post will cover how to fix Microsoft Security Essentials. This program will do all the heavy work for you just incase something happens to the main files of the application.
The Fix MSE Utility v 1.0 has been released. This freeware portable utility will reset all the Registry and other settings of Microsoft Security Essentials to default value.
Microsoft Security Essentials, is an excellent freeware antivirus offering from Microsoft. Microsoft Security Essentials runs quietly and efficiently in the background so that you are free to use your Windows-based PC the way you want—without interruptions or long computer wait times.
However, just in case anytime, you find that you are facing any issues in running Microsoft Security Essentials due to any reasons, simply run this utility. This utility will restore all its registry values & service settings to known good defaults, without re-installing MSE. It also re-registers the concerned .dll and .exe files, required to run MSE properly. The utility may take only a moment to run, but rest assured, it does the job! It works on both 32bit and 64bit of Windows Operating Systems.
Microsoft .Net Framework 2.0
Microsoft Security Essentials 1.0
Supported Operating System: