Windows 11 High Memory Usage Idle Fix [2026]
Quick Answer: Windows 11 uses 4-6GB RAM normally. If using 80%+ at idle, run taskkill /f /im SearchIndexer.exe to stop runaway indexing, and disable SysMain service.
Symptoms
- 80%+ memory usage with no apps open
- "Out of memory" warnings
- System sluggish
- Memory usage grows over time without restart
Root Cause
Search indexer runaway, SysMain caching, or memory leak in driver/service.
Fix
Method 1: Identify Memory Hogs
Get-Process | Sort-Object WorkingSet -Descending | Select-Object -First 10 Name, @{Name="MB";Expression={[math]::Round($_.WorkingSet/1MB,2)}}
Method 2: Stop Windows Search
Stop-Service WSearch
Set-Service WSearch -StartupType Disabled
Method 3: Disable SysMain
Stop-Service SysMain
Set-Service SysMain -StartupType Disabled
Method 4: Adjust Virtual Memory
- System Properties → Advanced → Performance Settings
- Advanced → Virtual Memory → Change
- Set custom: 4096-8192 MB
How Againly Helps
Againly runs check_memory_pressure to detect runaway processes and memory leaks.
[CTA: Try free diagnosis]
FAQ
Q: Is 8GB enough for Windows 11? A: Minimum 8GB, recommended 16GB for smooth operation.
Q: Will disabling search hurt performance? A: File search becomes slower, but system responsiveness improves.
Related: 100% Disk Usage Fix | Slow Boot Fix