Running into the uplay_r164.dll was not found error can instantly ruin your gaming session—especially when you’re ready to dive into your favorite Ubisoft title. This error typically appears when launching a game and is often tied to missing, corrupted, or misplaced Ubisoft Connect (formerly Uplay) files. Fortunately, it’s a fixable problem, and in most cases, you don’t need advanced technical knowledge to solve it.
TL;DR: The uplay_r164.dll error usually occurs due to corrupted Ubisoft Connect files, incomplete game installations, or outdated system components. Reinstalling Ubisoft Connect, verifying game files, and updating Windows or drivers often resolves the issue. Avoid downloading DLL files from random websites, as this can cause security risks. Follow the structured steps below for a safe and effective fix.
What Is uplay_r164.dll and Why Does It Matter?
The uplay_r164.dll file is a dynamic link library associated with Ubisoft Connect, the platform used to launch and manage Ubisoft games. DLL files contain essential code that allows programs to run specific features without embedding everything directly in the executable file.
When the system cannot locate or properly access uplay_r164.dll, you may see messages like:
- The program can’t start because uplay_r164.dll is missing from your computer.
- uplay_r164.dll was not found.
- This application has failed to start because uplay_r164.dll was not found.
These errors commonly occur due to:
- Accidental deletion of Ubisoft Connect files
- Corrupted installation
- Interrupted game updates
- Malware infections
- Outdated system drivers or Windows components
Step-by-Step Guide to Fix uplay_r164.dll Was Not Found Error
Let’s go through the most effective solutions in order. Start from the top and work your way down if needed.
1. Restart Your Computer
It may sound basic, but temporary system glitches can trigger DLL errors. Restarting your PC clears temporary memory files and may immediately solve the issue.
2. Reinstall Ubisoft Connect (Most Effective Fix)
Since the DLL file is part of Ubisoft Connect, reinstalling the platform is often the fastest and safest solution.
Follow these steps:
- Press Windows + R and type appwiz.cpl.
- Find Ubisoft Connect in the list.
- Click Uninstall.
- Restart your computer.
- Download the latest version from the official Ubisoft website.
- Install it and try launching your game again.
Why this works: Reinstallation restores missing or corrupted DLL files, including uplay_r164.dll, and ensures you’re using the latest compatible version.
3. Verify Game Files
If the error occurs only with one specific game, the issue may be related to that game’s installation rather than Ubisoft Connect itself.
To verify files:
- Open Ubisoft Connect.
- Go to your Games Library.
- Select the affected game.
- Click Properties.
- Choose Verify Files.
The launcher will scan the game directory and automatically replace missing or corrupted files.
Image not found in postmeta4. Reinstall the Problematic Game
If verifying files doesn’t solve the issue, a full game reinstall might be necessary.
Steps:
- Uninstall the game from Ubisoft Connect.
- Restart your PC.
- Reinstall the game.
A fresh installation ensures all required files, registry entries, and dependencies are properly structured.
5. Update Windows
Outdated Windows versions may lack system updates required for modern applications.
To update Windows:
- Go to Settings > Update & Security.
- Click Check for updates.
- Install any pending updates.
Windows updates often include critical system libraries that supports DLL functionality.
6. Update Graphics and System Drivers
While less common, outdated GPU drivers or system drivers can cause compatibility issues with gaming platforms.
Update GPU drivers through:
- NVIDIA GeForce Experience
- AMD Radeon Software
- Intel Driver Support Assistant
Keeping drivers current improves overall system stability and game compatibility.
7. Run a System File Checker Scan
Windows includes a built-in tool called System File Checker (SFC) that detects and repairs corrupted system files.
Run SFC scan:
- Open Command Prompt as Administrator.
- Type: sfc /scannow
- Press Enter and wait for the scan to complete.
This tool repairs corrupted DLL-related dependencies within the Windows environment.
8. Scan for Malware
Malware can corrupt or replace legitimate DLL files, triggering error messages.
Use:
- Windows Defender
- Malwarebytes
- Another trusted antivirus solution
Perform a full system scan to eliminate potential threats.
What NOT to Do
One of the most common mistakes users make is downloading DLL files from random third-party websites. While it may seem like a quick fix, it can introduce serious risks.
Avoid:
- Downloading standalone uplay_r164.dll files from unofficial sites
- Placing DLL files manually in system folders without proper guidance
- Editing the Windows registry unless you fully understand the implications
These actions can result in:
- Malware infections
- System instability
- Persistent compatibility issues
Comparison of Fix Methods
| Solution | Difficulty | Effectiveness | When to Use |
|---|---|---|---|
| Restart PC | Very Easy | Low to Medium | First quick attempt |
| Reinstall Ubisoft Connect | Easy | Very High | Most common fix |
| Verify Game Files | Easy | High | Only one game affected |
| Reinstall Game | Medium | High | Verification fails |
| Run SFC Scan | Medium | Medium | System file corruption suspected |
| Update Windows/Drivers | Medium | Medium | Outdated system |
Common Causes in Detail
Incomplete Updates
If your internet connection dropped during a Ubisoft Connect or game update, essential files may not have been installed properly.
Accidental Deletion
Some users manually clean folders to save space and may unknowingly remove necessary DLL files.
Antivirus Interference
Occasionally, antivirus programs may falsely flag DLL files as threats and quarantine them. Check your antivirus quarantine history before reinstalling.
Preventing Future DLL Errors
Once you fix the problem, take steps to prevent it from happening again:
- Keep Ubisoft Connect updated
- Avoid force-closing the launcher during updates
- Maintain updated Windows and drivers
- Use reliable antivirus protection
- Do not manually modify installation folders
Good system maintenance dramatically reduces the likelihood of DLL-related errors.
When to Contact Ubisoft Support
If none of the solutions above work, the issue may involve deeper compatibility conflicts or account-related problems.
Contact Ubisoft Support if:
- The error persists after full reinstallations
- Multiple Ubisoft games fail to launch
- You encounter additional error codes
Provide them with:
- Screenshots of the error
- Your system specifications
- Steps you’ve already attempted
Final Thoughts
The uplay_r164.dll was not found error may look intimidating, but in reality, it’s usually the result of a corrupted or incomplete Ubisoft Connect installation. In most cases, a simple reinstall of the launcher resolves the problem quickly and safely.
The key takeaway is to avoid quick, unsafe fixes like downloading standalone DLL files from unverified sources. Instead, follow structured troubleshooting steps that address the root cause. With the right approach, you can get back to your gaming session without unnecessary downtime—and without putting your system at risk.
Technical issues are frustrating, but they’re also manageable. A little patience and a systematic approach go a long way toward turning error messages into minor setbacks rather than full-blown headaches.
