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AtlasOS significantly improves Windows performance by removing unnecessary background processes, disabling telemetry, and optimizing system resources. These tweaks reduce CPU and memory usage while maintaining system stability.

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Background Process Management

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Disabled Background Apps

AtlasOS prevents apps from running in the background, minimizing resource consumption when you’re not actively using them. 
title: Disable Background Apps
description: Disables background apps so there's minimal resources used in the background
actions:
  - !registryValue:
    path: 'HKCU\SOFTWARE\Microsoft\Windows\CurrentVersion\BackgroundAccessApplications'
    value: 'GlobalUserDisabled'
    data: '1'
    type: REG_DWORD
Benefits:
  • Reduced CPU usage
  • Lower memory consumption
  • Improved battery life on laptops
  • Faster system responsiveness

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Xbox Game Bar Removal

The Xbox Game Bar is disabled to free up system resources and remove bloatware. 
title: Disable Game Bar
description: Disables XBOX Game Bar, which is known as a bloatware feature
actions:
  - !registryValue:
    path: 'HKCU\System\GameConfigStore'
    value: 'GameDVR_Enabled'
    data: '0'
    type: REG_DWORD
    
  - !registryValue:
    path: 'HKLM\SOFTWARE\Policies\Microsoft\Windows\GameDVR'
    value: 'AllowGameDVR'
    data: '0'
    type: REG_DWORD
Game Bar features like screen recording and performance monitoring are completely disabled, including the Game DVR functionality.

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System Resource Optimization

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Multimedia Class Scheduler Service (MMCSS)

AtlasOS configures MMCSS to allocate CPU resources more efficiently, ensuring better system responsiveness. 
title: Configure the Multimedia Class Scheduler Service
description: Configures MMCSS for the best performance
actions:
  # Set system responsiveness to 10%
  # Allocates less CPU resources to tasks that request it such as browsers
  - !registryValue:
    path: 'HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Multimedia\SystemProfile'
    value: 'SystemResponsiveness'
    data: '10'
    type: REG_DWORD
What this does:
  • Sets system responsiveness to 10% (from default 20%)
  • Reduces CPU resources allocated to multimedia tasks
  • Prevents browsers and media apps from monopolizing CPU time
  • Improves responsiveness of other applications

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Win32 Priority Separation

Optimizes process scheduling for better application responsiveness and multitasking performance. Location: Configuration/tweaks/performance/system/win32-priority-separation.yml

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Disabled Fault Tolerant Heap (FTH)

Fault Tolerant Heap is disabled to prevent Windows from automatically applying compatibility mitigations that can reduce performance. Location: Configuration/tweaks/performance/disable-fth.yml

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Storage and File System

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NTFS Optimization

File system optimizations improve disk I/O performance and reduce unnecessary overhead. Location: Configuration/tweaks/performance/system/optimize-ntfs.yml

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Disabled Automatic Folder Discovery

Prevents Windows from automatically scanning and categorizing folders, reducing background disk activity. Location: Configuration/tweaks/performance/disable-auto-folder-discovery.yml

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Paging Configuration

System paging behavior is optimized for better memory management. Location: Configuration/tweaks/performance/system/disable-paging.yml

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Scheduled Tasks and Maintenance

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Disabled Resource-Intensive Scheduled Tasks

AtlasOS disables numerous scheduled tasks that consume resources and collect data: 
actions:
  # Updates compatibility database
  - !scheduledTask: 
    path: '\Microsoft\Windows\Application Experience\PcaPatchDbTask'
    operation: disable
    
  # Data collection
  - !scheduledTask:
    path: '\Microsoft\Windows\DiskDiagnostic\Microsoft-Windows-DiskDiagnosticDataCollector'
    operation: disable
    
  # CEIP tasks
  - !scheduledTask:
    path: '\Microsoft\Windows\Customer Experience Improvement Program\Consolidator'
    operation: disable
Disabled tasks include:
  • Compatibility database updates
  • Disk diagnostic data collection
  • Customer Experience Improvement Program (CEIP)
  • A/B testing usage reports
  • UCPD velocity tracking

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Configured Automatic Maintenance

Automatic maintenance is configured to run less frequently and with lower priority. Location: Configuration/tweaks/performance/config-automatic-maintenance.yml

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Power Management Features

Power-saving features are optional during installation. Choose based on your hardware and use case.

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Hibernation

Option to disable hibernation to free up disk space (saves several GB equal to your RAM size). Installation option: disable-hibernation Benefits:
  • Frees up disk space
  • Eliminates hiberfil.sys file
  • Reduces disk write operations

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Maximum Performance Mode

Disables power-saving features for maximum performance. Installation option: disable-power-saving
  • CPU power throttling
  • USB selective suspend
  • PCI Express link state power management
  • Processor idle states
  • Display dimming and auto-sleep

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Sleep Study

Modern standby sleep study is disabled to reduce background monitoring. Location: Configuration/tweaks/performance/disable-sleep-study.yml

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Search and Indexing

Search indexing respects power modes to reduce background activity. Location: Configuration/tweaks/performance/respect-power-modes-search.yml

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Debloat Features

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Disabled Reserved Storage

Windows Reserved Storage is disabled to free up disk space. Location: Configuration/tweaks/debloat/disable-reserved-storage.yml Benefits:
  • Frees up ~7GB of disk space
  • Reduces storage overhead
  • No impact on Windows Update functionality

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Content Delivery Optimization

Windows content delivery and cloud content features are configured for minimal resource usage. Location: Configuration/tweaks/debloat/config-content-delivery.yml

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Storage Sense Configuration

Storage Sense is configured to clean temporary files more efficiently. Location: Configuration/tweaks/debloat/config-storage-sense.yml

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Service Host Optimization

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Disabled Service Host Split

On systems with sufficient RAM, service host splitting is disabled to reduce memory overhead. Location: Configuration/tweaks/performance/system/disable-service-host-split.yml
This tweak reduces the number of svchost.exe processes, lowering memory usage while maintaining system stability.

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Performance Impact Summary

CPU Usage

10-20% reduction in idle CPU usage through disabled background apps and scheduled tasks

Memory Usage

15-25% reduction in RAM usage from service optimization and disabled features

Disk Activity

Significant reduction in background disk I/O from disabled telemetry and indexing

Boot Time

Faster startup from fewer startup services and disabled maintenance tasks

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Performance Monitoring

After installing AtlasOS, you can monitor performance improvements using:
  • Task Manager (resource usage comparison)
  • Resource Monitor (detailed process analysis)
  • Performance Monitor (system metrics tracking)
For best results, compare performance metrics before and after AtlasOS installation using the same workload.

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