Download & Play

1. Open Windows Security from the Start menu
2. Click Virus & threat protection
3. Under settings, click Manage settings
4. Scroll to Exclusions → Add or remove exclusions
5. Click Add an exclusion → Folder → select C:\MuOnlineS21

If the installer was already blocked, check Protection history and click Allow.

1. Open Kaspersky → Settings (gear icon)
2. Security Settings → Exclusions and actions on object detection
3. Click Manage exclusions → Add
4. Browse to your game folder, check all components, click Add

1. Open Norton → Settings → Antivirus
2. Under Scans and Risks, click Configure next to exclusions
3. Click Add Folders and select your game folder
4. Also add the folder under Auto-Protect / SONAR exclusions

1. Open Avast → Menu → Settings
2. General → Exceptions
3. Click Add Exception, browse to your game folder, confirm

1. Open Bitdefender → Protection → Antivirus Settings
2. Go to Exclusions tab → Add → Folder
3. Check both On-access and On-demand scanning

1. Open ESET, press F5 for Advanced Setup
2. Detection Engine → Exclusions → Performance Exclusions
3. Click Edit → Add, enter your game folder path

1. Open McAfee → My Protection
2. Real-Time Scanning → Excluded Files
3. Click Add folder, select your game folder, click Apply