Windows 7 - Microsoft Security Essentials Install Issue

I need some help here. I have just downloaded Windows Security Essentials for a perfectly genuine version of Windows 7 Ultimate 64 Bit. Unfortunately, during the point of validation during the installation, a window comes up saying: "Windows Security Essentials Setup has stopped working."

Here was the problem Information
Problem signature:
Problem Event Name: APPCRASH
Application Name: setup.exe_Microsoft Security Essentials Setup
Application Version: 1.0.1961.0
Application Timestamp: 4b812849
Fault Module Name: setup.exe
Fault Module Version: 1.0.1961.0
Fault Module Timestamp: 4b812849
Exception Code: c0000005
Exception Offset: 0000000000062988
OS Version: 6.1.7600.2.0.0.256.1
Locale ID: 1033
Additional Information 1: 7402
Additional Information 2: 740285139a2402ec95caf8db7c81320a
Additional Information 3: c576
Additional Information 4: c576188442d0528e7f21a5460369dcd0

I'll see if I can find an error code.

Re-download the program and see how you go.

What other Anti-Virus were you using before downloading MSE?

I have already re-downloaded the application at least 3 times. It gives me the same message every time.
This happened before I even installled any security programs. I then installed trend micro because I had nothing else at the time. That was of course, before I learned that Trend Micro Antivirus is a resource hog, and would often crash my computer during times of high resource usage. Is there any way this problem can be fixed? I mean, I've searched the forums here, and found no answers that have worked, such as the forum by Hazr:
Installation Error 0x80070643

Just as effective as MSE is Avast IMO -- I know it doesn't resolve the problem but can u try installing Avast; at least then u will have an effective working security program until folk here attempt to diagnose.

I ASSUME you are downloading from this official site and the correct version for your operating system.

http://www.microsoft.com/security_essentials/

Also look at C:\ProgramData\Microsoft for a folder for MSE and delete it before trying to reinstall.

Jim

I did download security essentials from that site, and its not working. I tried going into the Microsoft Program Data file and deleting Security Essentials.
I even tried deleting windows defender on the basis that it could possibly be messing things up.

Go back to the MSE site and submit a support case to Microsoft. It is free support.

Jim