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ftserui2.dll - Analyze and How to Fix Errors

★★★★★ Verified File (27.08.2026)

Description


Creation date: 05.07.2021 15:35:07
File version: 2.12.36.4
Antivirus scan: ✅ OK
Category: System
File size: 73.5 kb.
Architecture: 64-bit (x64)
✅ This file is compatible with 64-bit Windows and ❌ will not work on a 32-bit operating system.
How to determine your system architecture: Press keys Win+R , enter symbols wmic os get osarchitecture , press Enter.

Digital file signature ftserui2.dll

Publisher: Future Technology Devices International Ltd
Issuer: Symantec Class 3 Extended Validation Code Signing CA - G2
Encryption algorithm: SHA1
Time stamp: Jul 5 13:35:09 2021 GMT

The file ftserui2.dll is a dynamic link library (DLL) that plays a crucial role in the Windows operating system. A DLL is a collection of instructions and data that can be used by multiple programs simultaneously, which helps to optimize memory usage and improve performance.

MD5: 3e4bca474805ac6ea152b5020f81f4b7
SHA-1: 4ccaa1079df071068e6309f4ea0546411f1ae243
SHA-256: 4c1273cc2fdcf911d20d24d21c26647854626845888445c870098cfe7ec9eb3e

Where it is Used

The ftserui2.dll file is likely associated with device drivers or system utilities. It could be related to serial communication or peripheral devices, as indicated by the imports and exports in its characteristics. For instance, it may interact with functions from libraries like msvcrt.dll, USER32.dll, and SETUPAPI.dll. While specific applications are not known, common programs that might use this DLL include serial port management tools or device drivers.

Errors Related to ftserui2.dll

If the ftserui2.dll file is missing or corrupt, you may encounter errors such as "ftserui2.dll not found," "missing ftserui2.dll," and "error loading ftserui2.dll." These issues can cause your system to behave unpredictably or even crash. Common symptoms might include application crashes, system instability, or specific program failures.

File Security

The file characteristics indicate that ftserui2.dll is a legitimate part of the Windows operating system and is not associated with any known viruses. However, if you encounter errors related to this DLL, it's advisable to check for updates or reinstall the related program to ensure it remains secure.

ftserui2.dll was not found
The code execution cannot proceed because ftserui2.dll was not found
Failed to load ftserui2.dll
The procedure entry point ... could not be located in ftserui2.dll

1.
2a. 👉 Try to copy ftserui2.dll C:\Program Files\Your program\
2b. Also try to copy to bin, lib folders.
2c. Try to copy ftserui2.dll C:\Program Files (x86)\Your program\
👉 Before replacing the files, make backups.
How do I switch to the current Windows directory?
- Press and hold the key "win" on the keyboard and press the key "r" , then write %windir% and press the key Enter.
How to switch to the directory Program Files (x86) ?
- Press Win+R then enter %ProgramFiles(x86)% and after press Enter.

How to Fix Errors

  • Reinstall the Program: Reinstalling the application that uses this DLL can resolve issues. This often includes device drivers or system utilities like those for serial communication.
  • Update Windows: Ensure your Windows operating system is up to date with the latest security patches and updates, which may include critical fixes for DLL-related errors.
  • Manually Replace ftserui2.dll (Caution Required): If you have a backup of the correct version, you can manually replace the file. Downloading from official sources or trusted repositories is recommended to avoid introducing malware.

FAQ

Q: Why am I getting an error related to ftserui2.dll?
A: The error could be due to the file being missing, corrupt, or incompatible with your current system. Reinstalling the application or updating Windows might resolve the issue.

Q: Can I download ftserui2.dll from anywhere?
A: It's best to obtain it from official sources or trusted repositories to avoid introducing malware into your system.

Conclusion

The ftserui2.dll file is an essential component of the Windows operating system, particularly for device drivers and utilities. Ensuring its integrity can prevent errors that disrupt system performance. If you encounter issues, follow the steps outlined above to fix them.


File Description: ftserui2.dll

  • Full Name: FTDI FT232R USB UART Driver User Interface Component
  • Purpose: This is a dynamic link library (DLL) file developed by Future Technology Devices International (FTDI). It provides the user interface property pages and configuration utilities for FTDI USB-to-Serial converter chips (like the widespread FT232R chip used in Arduinos, programmers, and industrial hardware).
  • Safe Status: Safe. It is a legitimate, non-Windows system driver component.

Standard File Locations

Depending on your Windows architecture and driver version, the file is standardly located in one of these directories:

  • Primary Location: C:\Windows\System32\drivers\
  • 64-bit Systems (32-bit driver compatibility): C:\Windows\SysWOW64\
  • Driver Store Backup: C:\Windows\System32\DriverStore\FileRepository\ (inside specific ftdi*.inf folders)

How to Fix ftserui2.dll Errors Without Downloading

Do not download individual DLL files from third-party websites, as they often contain malware or outdated versions. Instead, use these built-in safe methods to repair the error:

1. Reinstall the FTDI Driver via Device Manager

Most ftserui2.dll errors occur because the USB-to-Serial driver is corrupted.

  • Disconnect your USB-to-Serial device from the computer.
  • Press Windows Key + X and select Device Manager.
  • Click View at the top menu, then select Show hidden devices.
  • Expand Ports (COM & LPT) or Universal Serial Bus controllers.
  • Look for FTDI, USB Serial Port, or any item with a yellow warning triangle.
  • Right-click the device and choose Uninstall device.
  • Check the box that says "Attempt to remove the driver for this device" and click Uninstall.
  • Restart your PC, reconnect the USB device, and Windows will automatically reinstall a clean copy of the driver from its internal cache.

2. Run the System File Checker (SFC)

If the file was cached by Windows but got corrupted, the built-in system file checker can repair it.

  • Press Windows Key + S, type cmd.
  • Right-click Command Prompt and select Run as administrator.
  • Type sfc /scannow and press Enter.
  • Wait for the verification to reach 100%, then restart your computer.

3. Re-register the DLL Component

If the file exists on your system but Windows cannot read it, re-registering it through the command line can resolve the error.

  • Open Command Prompt as an administrator.
  • Type regsvr32 /u ftserui2.dll and press Enter (this unregisters the corrupted instance).
  • Type regsvr32 ftserui2.dll and press Enter (this registers the file fresh).

4. Reinstall the Software Causing the Error

If the error only appears when opening a specific app (e.g., Arduino IDE, specialized tuning or diagnostic software):

  • Press Windows Key + R, type appwiz.cpl, and press Enter.
  • Locate the program that triggers the error.
  • Right-click it and select Uninstall.
  • Reinstall the program using its official installer, which will automatically place a fresh, working copy of the required FTDI components back into your system.
Other versions:
️ ftserui2.dll 2.12.36.4 32-bit (x86)
Future Technology Devices International Ltd