How to Disable Windows Defender Real-Time Scanning for Game Folders

What Causes This?

Microsoft Defender real-time protection scans files when apps open, change, or create them. Games often stream large asset files, build shader caches, unpack archives, update anti-cheat components, and write logs while you play. On slower storage, heavily modded installs, or systems already under high CPU or disk load, that extra scanning can add stutter, longer loading, or brief freezes.

Common Symptoms

• Games hitch when loading new areas, textures, or shaders
• Load times are worse after a patch or first launch
• CPU or disk usage spikes from Antimalware Service Executable
• Modded games freeze or pause during launch
• Slowdowns happen more often during installs, updates, or shader compilation

How to Fix It Manually

Instead of disabling Defender for the whole PC, add exclusions only for the game folders you trust.

1. Open Windows Security

   • Press Start, type Windows Security, then open it.
   • Select Virus & threat protection.

2. Open exclusion settings

   • Under Virus & threat protection settings, select Manage settings.
   • Scroll to Exclusions and choose Add or remove exclusions.
   • If prompted by User Account Control, approve the change.

3. Add the game folder

   • Select Add an exclusion > Folder.
   • Browse to the game’s install folder and select it.
   • Common locations include:
     • C:\Program Files (x86)\Steam\steamapps\common\
     • C:\Program Files\Epic Games\
     • C:\XboxGames\
     • A custom library such as D:\Games\

4. Exclude the specific game, not the whole library if you can

   • Prefer the exact game folder over the entire Steam, Epic, or Xbox library.
   • Example: exclude D:\Games\Elden Ring instead of D:\Games.
   • This keeps the rest of the library covered by real-time scanning.

5. Add other trusted folders only if the problem continues

   • Some games also hit Defender scans in related folders, such as:
     • A game-specific mods folder
     • A launcher cache folder you recognize
     • A game data folder under C:\Users\YourName\Documents\My Games\
   • Only exclude folders you know belong to the game or launcher.
   • Do not exclude your whole user profile, Program Files, or an entire drive.

6. Test again and watch usage

   • Close and reopen the game after adding the exclusion.
   • Open Task Manager with Ctrl + Shift + Esc and check whether CPU or Disk usage from Antimalware Service Executable still spikes during launch or area loads.
   • If the spikes are smaller and the stutter is reduced, the exclusion likely helped.

7. Use full real-time protection disablement only as a short test

   • In Windows Security > Virus & threat protection > Manage settings, you can temporarily switch off Real-time protection.
   • Windows may turn it back on automatically, and leaving it off lowers protection for the whole PC.
   • If you try this, use it only to confirm the cause, then turn it back on right away.

Fix It Automatically with Kudu

Kudu cannot change Microsoft Defender exclusions for you. What it can do is help you check whether background load is the real problem: use Performance Monitor to see CPU, memory, disk, and network activity in real time and identify whether Antimalware Service Executable, a launcher, or another process is causing the spikes. On Windows, Game Mode can also apply supported gaming tweaks and record how to restore them, without disabling security features.

Download Kudu Free →