The Sims 4 Launcher Trojan Warning Fix is now rolling out to Windows players after EA confirmed that a recent launcher issue caused some antivirus programs to incorrectly detect the game launcher as malicious software. If you were greeted with a Trojan warning or found that TS4_Launcher_x64.exe had been quarantined, there is good news. EA has released an official fix designed to resolve the problem without affecting your game, saves, mods, or custom content.
The update is being distributed gradually, so if you have not received it just yet, it should become available soon.
What caused the Sims 4 launcher Trojan warning?
Earlier this week, many Windows players reported that antivirus software, including Windows Defender and other security programs, flagged TS4_Launcher_x64.exe as a Trojan.
Rather than being caused by malware, EA has confirmed the issue was related to the launcher’s digital signature. Digital signatures help Windows verify that software comes from a trusted developer. When there is an issue with that verification, antivirus software can mistakenly identify the file as suspicious.
For some players, this resulted in the launcher being automatically quarantined, preventing The Sims 4 from opening altogether.
EA has released the Sims 4 Launcher Trojan Warning Fix
EA has now begun rolling out a targeted Windows-only launcher update to resolve the problem.
According to EA, this update focuses solely on the launcher itself. It is not a game patch and does not introduce gameplay changes or new content.
If you have automatic updates enabled through the EA App, the launcher should update automatically as the rollout reaches your account.
What does the Sims 4 Launcher Trojan Warning Fix change?
The update is intentionally small and only addresses the launcher issue.
| Feature | Updated? |
|---|---|
| Windows launcher | Yes |
| Game version | No |
| Save files | No changes |
| Mods | Unaffected |
| Custom Content | Unaffected |
| Gameplay | No changes |
Because this is a launcher update rather than a full Sims 4 patch, players should notice no difference once the game opens normally again.
Are mods and Custom Content safe?
Yes.
EA has confirmed that the Sims 4 Launcher Trojan Warning Fix does not alter your installed game files beyond the launcher itself.
That means:
- Mods remain installed.
- Custom Content is unaffected.
- Save files remain intact.
- Existing game progress is preserved.
There is no need to reinstall your Mods folder simply because of this update.
What if your antivirus quarantined the launcher?
If your antivirus software previously quarantined or deleted the launcher, updating alone may not immediately solve the issue.
After the launcher update has been installed, EA advises that some players may need to repair The Sims 4 through the EA App.
Repairing the game checks the installation and replaces any missing launcher files that may have been removed by your antivirus software.
If your game still refuses to launch after receiving the update, running a repair should be your next step before attempting a full reinstall.
Why were Mac players unaffected?
The issue only affected Windows systems.
macOS verifies software differently, and because the problem involved the Windows launcher’s digital signature, Mac players did not receive the same false Trojan warnings.
If you play The Sims 4 on macOS, there is nothing you need to install regarding this specific fix.
How to get the Sims 4 Launcher Trojan Warning Fix
The rollout has already begun, but it may take a little time before every Windows player receives the update.
To make sure you receive it:
- Open the EA App.
- Allow the launcher to update if prompted.
- Launch The Sims 4 normally.
- If the launcher was previously quarantined, run a Repair from the EA App after updating.
Once the launcher has been updated successfully, the false antivirus warnings should no longer occur.
What this means for Sims 4 players
Although seeing antivirus software report a Trojan can be alarming, EA has confirmed this was a false detection caused by a launcher verification issue rather than an actual security threat.
The Sims 4 Launcher Trojan Warning Fix is already rolling out for Windows players and is designed to restore normal launching without changing the game itself. Your saves, Mods, Custom Content, and current game version all remain untouched.
If your antivirus removed the launcher before the fix became available, repairing your installation through the EA App should restore any missing files once the update has been installed.
