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Does MSE require MSMpEng.exe?

post #1 of 5
Thread Starter 
Was just looking at the thread about AVs and found that some people that have MSE do not have MSMpEng.exe running. I Googled it and found that it's a part of windows defender, which I have disabled.

I tried uninstalling MSMpEng.exe and MSE stopped working, so I uninstalled and reinstalled MSE and now MSMpEng.exe is back. Is MSMpEng.exe required by MSE or not?

Edit: OK I found a site that explained it. Both MSE and defender use the service. Still doesn't explain why some people would have MSE without MSMpEng.exe though.
Edited by Daggerfist - 1/4/11 at 3:23am
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post #2 of 5
I installed MSE and it used MsMpEng.exe. MSMpEng.exe was never on my system before. It was a cpu hog and would use about 60% of my my ram most of the time (I have a dual core 3.0GHz & 5GB ram). I just deleted it and reinstalled OutPost PRO Security Suite 7.0.4 and NIS 2011. Problem solved.
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post #3 of 5
Here a screenshot of it...
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post #4 of 5
I have MSE installed, and my system uses the process, I didn't disable Windows Defender, but, it didn't appear on my system until after MSE was installed. All it is is a service file anyways, so, you can start/stop it if you don't want to use it.
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post #5 of 5
Quote:
Originally Posted by Hondais1;11888040 
I installed MSE and it used MsMpEng.exe. MSMpEng.exe was never on my system before. It was a cpu hog and would use about 60% of my my ram most of the time (I have a dual core 3.0GHz & 5GB ram). I just deleted it and reinstalled OutPost PRO Security Suite 7.0.4 and NIS 2011. Problem solved.

On that screenshot it is using 56 Mb of ram and your physical memory usage is at 24%. It is also running a scan on your computer, which it does when it is first installed. Mine uses about 64 Mb of ram and 0% CPU while not scanning, which is normal.
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