warningLauncher ErrorsAffects: All versions on Windows
How to Fix Windows Defender Blocking Minecraft
Fix Windows Defender Blocking by adding .minecraft and Java to the exclusion list.
Quick Fix
Add the .minecraft folder and javaw.exe to Windows Defender exclusions.
Error Message
Windows Defender blocked Minecraft / Java platform SE binary blockedHow to Fix
1
Open Windows Security > Virus & threat protection > Manage settings > Exclusions
2
Add %appdata%/.minecraft folder
3
Add the Java installation directory
4
Disable Controlled Folder Access or add Minecraft as allowed app
Common Causes
- Windows Defender flagging Java as a threat
- Controlled Folder Access blocking game writes
- SmartScreen blocking launcher or installer
Diagnostic Steps
- Open Windows Security
- Go to Exclusions
- Add .minecraft folder
- Add Java path
- Restart launcher
FAQ
Is this a false positive?
Yes. Official Minecraft and Java files are safe. Windows Defender sometimes flags Java processes incorrectly.