Ui Error 27393 Black Ops 3 Review

Fixing UI Error 27393 in Call of Duty: Black Ops III

UI Error 27393 is a common multiplayer matchmaking/connection error in Call of Duty: Black Ops III that prevents players from joining matches, accessing multiplayer features, or connecting to online services. Below is a concise, actionable guide covering causes, step-by-step troubleshooting, and preventative tips.

5. Run in Windowed Mode (The Workaround)

If the error crashes your game instantly upon opening a menu, force the game to render differently.

Go to Documents\Call of Duty Black Ops III\players\config.ini
Find: WindowMode = "Fullscreen" (or "Fullscreen")
Change it to: WindowMode = "Windowed"
Save and launch.

Fix 5: Update or Roll Back GPU Drivers

Oddly, both outdated and cutting-edge drivers can cause error 27393. ui error 27393 black ops 3

If you haven’t updated in months: Download the latest driver from NVIDIA or AMD. Perform a Clean Installation (select “Custom” > “Perform a clean install”).
If you just updated: Roll back to a known stable driver. For Black Ops 3, drivers from 2022–2023 are often more stable than 2025/2026 Game Ready drivers. Use Display Driver Uninstaller (DDU) in Safe Mode to remove your current driver completely, then install version 537.58 (NVIDIA) or 23.11.1 (AMD).

4.3. Enable UPnP or Port Forwarding

To resolve NAT type issues, the router must allow the game to bypass strict firewall rules.

Option A (UPnP): Log into your router settings and enable "Universal Plug and Play." This allows the game to automatically open the ports it needs.
Option B (Port Forwarding): If UPnP fails, manually forward the following ports for your platform:
- TCP: 3074, 27014-27050
- UDP: 3074, 3478, 4379, 4380, 27000-27030

4.4. Verify Integrity of Game Files (Steam)

Corrupted game files can cause the UI module to fail when trying to handshake with the server. Fixing UI Error 27393 in Call of Duty:

Open Steam Library.
Right-click Call of Duty: Black Ops III > Properties.
Navigate to the Installed Files tab.
Click Verify Integrity of Game Files.
Wait for the process to complete and launch the game.

4.2. Flush DNS and Reset Network (PC Specific)

This is the most common fix for PC players encountering UI Error 27393. It clears corrupted cached data that may be pointing to defunct server IP addresses.

Press Windows Key + R, type cmd, and press Enter.
In the Command Prompt, type the following and press Enter after each line:
- ipconfig /flushdns
- ipconfig /registerdns
- ipconfig /release
- ipconfig /renew
Restart the computer and launch the game.

Fix 7: Increase Windows Page File (Virtual Memory)

Since error 27393 is memory-related, insufficient page file can force crashes. Go to Documents\Call of Duty Black Ops III\players\config

Steps:

Right-click This PC > Properties > Advanced System Settings.
Under Performance, click Settings > Advanced > Virtual Memory > Change.
Uncheck “Automatically manage paging file size for all drives.”
Select your main drive (C:).
Choose Custom size:
- Initial size: 16,384 MB (16 GB)
- Maximum size: 24,576 MB (24 GB)
Click Set > OK and restart.

What is UI Error 27393 in Black Ops 3?

Unlike standard crash codes (like 0xc0000005), UI Error 27393 is specific to Treyarch’s engine and the game’s interaction with your User Interface files. The "UI" refers to the HUD, menus, and rendered textures. The error essentially means that the game’s executable (blackops3.exe) is trying to load UI assets that are either corrupted, mismatched in version, or blocked by another program.

5. Workaround for Persistent Issues

If the error persists, users have reported success with a specific in-game workaround:

Start the game.
Once the error appears, go to Settings > Network.
Select "Test Internet Connection" (Note: This refers to the in-game network test, not the console/Steam test).
Wait for the test to complete. This sometimes forces the game to re-authenticate with the server.
Return to the Multiplayer menu.