Microsoft Security Essentials Client Update Package

Recently, a Windows update arrived called Microsoft Security Essentials Client Update Package - KB2544035. Since then my computer started malfunctioning. Whenever, I try to install the update, everything goes fine, and then suddenly goes blank and the desktop returns (but the Windows update screen had closed). When I open Windows update, it shows that the aforesaid update is not installed. And when I try to open Microsoft Security Essentials shortcut on my desktop, the machine is not able to find it and asks to delete it. I can't even open Microsoft Security Essentials manually from Program files. Things return to normal on System Restore. But the Microsoft Security Essentials appears potentially unprotected and asks for a full system scan. But before the scan is complete the Microsoft Security Essentials screen closes and the desktop returns once again. And, once again, when I try to open Microsoft Security Essentials shortcut on my desktop, the machine is not able to find it.