Fix Antimalware Service Executable High CPU and Memory Usage on Windows 11
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Experiencing high CPU or memory use because of the Antimalware Service Executable (MsMpEng.exe)? You're not alone — it's one of the most common performance issues in Windows 10 and 11. In this video, I'll walk you through proven fixes that tackle the root cause and help get your system running smoothly again 👌
🧰 What You'll Fix Today:
Change Defender’s scheduled scan settings to ease the load
Add exclusions so Defender stops scanning itself or large files
Temporarily disable real-time protection (safe when used properly)
Clean boot your PC to pinpoint any conflicting background apps
Apply the right tools: Task Scheduler, Windows Security, and Registry Editor
📊 Why MsMpEng.exe Spikes Resources:
Antimalware Service Executable is part of Windows Defender’s real-time engine. It scans every file, download, or webpage on the fly — great for security, not so great when it hogs CPU/RAM or becomes stuck on a large file
🔧 Step-by-Step Fixes Covered:
1. Reschedule Defender Scans
Open Task Scheduler (run taskschd.msc) → navigate to
Task Scheduler → Microsoft → Windows → Windows Defender → Windows Defender Scheduled Scan → uncheck Run with highest privileges and under Conditions, disable all triggers
2. Exclude the Process
Go to Windows Security → Virus & threat protection → Manage settings → Exclusions → add MsMpEng.exe as exclusion to prevent self-scans
3. Disable Real-Time Scanning (Optional)
Simply toggle off real-time protection in Windows Security. This stops background scans — just remember to turn it back on later
4. Perform a Clean Boot
Use msconfig to disable non-essential services and startup apps, helping identify conflicts that cause resource spikes
MedhaCloud
💡 Bonus Tips:
Check Windows Defender Protection History — error entries might show what's triggering the scan
Searching through Resource Monitor helps reveal which file’s being processed
✅ These fixes are taken from the top-ranked Microsoft support threads, recent video tutorials, and tech articles — so they’re recorded, tested, and proven to work.
👍 If your system runs smoother after this, drop a like, and if you’re still struggling with Defender or system performance, leave a comment — I’m here to help!
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