Why is the CPU load / usage 100% for MsMpEng.exe and how to fix it?

Murat Düzer October 30, 2012
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MSMPENG.EXE is running at 100% CPU because of MSE. I know that it’s a Windows Defender and or Mcrosoft Security Essentials process.

Please help me fix this. This might be an older system,but it’s the family internet/homework system, and normally it runs like a champ.

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