Last updated on March 10, 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 Software | Versions Affected | Notes |
|---|---|---|
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 Security | All Versions | Causes 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 |
Parental control software
| Name of Software | Versions Affected | Notes |
|---|---|---|
Covenant Eyes | Versions below 7.2.41 | Causes login problems. Updating to a version above 7.2.41 should fix the issue. If it doesn’t, uninstall it. |
Malware and adware
| Name of Software | Versions Affected | Notes |
|---|---|---|
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 Software | Versions Affected | Notes |
|---|---|---|
| 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 Software | Versions Affected | Notes |
|---|---|---|
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 |
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. |