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Incompatible software list. 2021 update

Last updated on October 21, 2021

Programs on this list are known to cause problems with Minecraft, and should be removed.

This is an updated version of the list that appears here. Links have been fixed, and some programs added or removed.

Antivirus and Firewalls

Note: We recommend Windows defender or Malwarebytes as your antivirus.

Name of SoftwareVersions AffectedNotes

AVG Antivirus

All Versions

Causes download problems.

Uninstall Tool

BitDefender

All Versions

Causes download problems, login issues and problems connecting to LAN worlds.

Uninstall instructions

ByteFence

All Versions

Causes download problems

Comcast Constant Guard

All Versions

Causes control issues

Comodo Internet Security

All Versions

Causes login and multiplayer connectivity problems.

Disabling the firewall will help, but it is recommended that you uninstall it

ESET Antivirus

All Versions

Causes login and multiplayer connectivity problems.

ESET Security has a feature that interferes with Minecraft’s ability to connect to Mojang’s servers. To fix it, follow these instructions here, and set the mode to Interactive. Then, open the launcher and try to log into Minecraft. ESET will open a window asking what to do, press EXCLUDE.If the above fix does not work, you will need to uninstall ESET Antivirus.

Uninstall Tool: Windows / Mac
K7 Total SecurityAll VersionsCauses login and multiplayer connectivity problems. (Source) Should be uninstalled and replaced by MalwareBytes/Windows Defender.

Kaspersky Internet Security

All Versions

Causes login and multiplayer connectivity problems.

If you are using Kaspersky Internet Security and cannot connect to Mojang’s servers, turn off Encrypted Connections Scan by following this guide.

If the above fix does not work, you will need to uninstall Kaspersky Internet Security.

Uninstall Tool here

Lavasoft Ad-aware Web Companion

All Versions

Causes login and multiplayer connectivity problems.

After you have uninstalled it from the Control Panel, follow these instructions here to complete uninstalling with AdwCleaner.

McAfee Anti-virus / Intel Security

All Versions

Causes login and multiplayer connectivity problems.

Uninstall with MCPR Tool

Norton Antivirus

All Versions

Causes download, login and multiplayer connectivity problems, degrades performance.

Uninstall Tool here

PCKeeper / MacKeeper

All Versions

Causes login and multiplayer connectivity problems, degrades performance, reputation questionable.

Uninstall instructions: PC / Mac

Reason Security

All Versions

Causes download errors, as well as login and multiplayer connectivity problems, degrades perform

Webroot SecureAnywhere

All Versions

Causes login and multiplayer connectivity problems.

If you’re having issues joining a LAN world while using Webroot SecureAnywhere, open your settings, navigate to System Tools –> System Control –> Control Active Processes and make sure Java and Minecraft are set to Allow.

Uninstall instructions if uninstall fails

ZoneAlarm Firewall

All Versions

Causes login and multiplayer connectivity problems, degrades performance

Internet Banking Software

Name of SoftwareVersions AffectedNotes
All (Raport, Warsaw, etc.) All

Causes issues opening the launcher.


Currently, the only known solution is to uninstall the software and restart your device.

Malware and adware

Name of SoftwareVersions AffectedNotes

PremierOpinion

All Versions

Causes general and memory related crashes. Commonly crashes the game with exit code -805306369. Also prevents skins being displayed

Download and run  AdwCleaner. When the scan completes, restart your PC. 

RelevantKnowledge

All Versions

Causes crashes and game performance issues. Also prevents skins being displayed

Download and run  AdwCleaner. When the scan completes, restart your PC. 

WebCompanion

All Versions

Causes crashes and game performance issues.

Download and run  AdwCleaner. When the scan completes, restart your PC. 

IDMan

All Versions

Not detected by AdwCleaner

Presents like a VPN, Can cause download issues and other issues with the game

Download and run  AdwCleaner. When the scan completes, restart your PC. 

Game enhancement software

Name of SoftwareVersions AffectedNotes
BlueStacks

All versions

Crashes Minecraft with exit code: -1073741819

Uninstall BlueStacks to fix the issue. 

Discord

All Versions

Causes freezes or crashes.

Disable the Overlay feature in Discord.

Evolve and/or Player.me

All Versions

Causes freezes or crashes.

Disable the the Ingame Overlay feature.

GeForce Experience

All Versions

Can cause crashes, freezes and mouse control issues.

Disabling the in-game overlay should solve this issue. Laptop users should also disable Whisper Mode and Battery Boost.

Razer Synapse / Razer Cortex

All Versions

Crashes the game with exit code -805306369 or Out Of Memory Errors by limiting the amount of memory Minecraft is allowed to use.

Uninstall the software then delete _JAVA_OPTIONS=-Xmx256mb (or 512mb) from your Enviroment Variables.

Symless Synergy

All Versions

Breaks mouse movements in Minecraft.

VPNs and Networking Bridging Software

Name of SoftwareVersions AffectedNotes

Hamachi / Tunngle

All Versions

Causes login and multiplayer connectivity problems.

Fundamentally conflicts with the Internet as it is squatting on an occupied block of IPv4 address. Also has the tendency to break Minecraft multiplayer.

For proper server hosting, use the guides below to self host a server with port forwarding, or use a server host such as Minecraft Realms.

Vanilla server setup guide

Forge server setup guide

Hola Unblocker

All Versions

Causes login problems.

Turns your computer into a botnet, allowing malicious users to use your internet connection for illegal activities; see this website for more details.

All free VPNs and some paid VPNs

N/A

Causes login problems.

Mojang has blocked most VPN users from logging into Minecraft as these free VPNs are often used by malicious users to hack into accounts.

In most cases, using “split tunneling” to allow Minecraft to bypass your VPN, will resolve the issue.
Published inJavaMinecraft KBr/MinecraftHelp
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