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wdfcoinstaller01009_ser2pl.dll - Analyze and How to Fix Errors

★★★★★ Verified File (27.08.2026)

Description


Creation date: 14.07.2009 02:04:59
File version: 1.9.7600.16385
Antivirus scan: ✅ OK
Category: Driver Support
File size: 1698.1 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 wdfcoinstaller01009 ser2pl.dll

Publisher: Microsoft Corporation
Issuer: Microsoft Windows Verification Intermediate PCA
Encryption algorithm: SHA1
Time stamp: Jul 14 21:21:20 2009 GMT

The dll (Dynamic Link Library) file, specifically the one with the filename "wdfcoinstaller01009 ser2pl.dll," is a crucial component in Windows operating systems. DLL files are shared libraries that contain code and data that can be used by multiple programs simultaneously to avoid redundancy.

MD5: f7653e38582b8b864f5b6e60915d46bc
SHA-1: 326fbbd839ac675921285cfa06a9781513be0ff9
SHA-256: b907d8de1d6084e3e939014f2ed03cc55e44780bdef5717cee6c52d122b5d52e

Where it is Used

This file, "wdfcoinstaller01009 ser2pl.dll," is likely associated with Windows drivers and installation processes. It might be related to the setup or installation of certain hardware components such as USB devices. However, without specific information, it's difficult to pinpoint the exact program or component it belongs to.

Errors Related to wdfcoinstaller01009 ser2pl.dll

  • "wdfcoinstaller01009 ser2pl.dll not found": This error occurs when the file is missing, which can lead to system instability or application crashes.
  • "missing wdfcoinstaller01009 ser2pl.dll": Similar to the "not found" error, this indicates that the required DLL is absent, causing issues with software functionality.
  • Error loading wdfcoinstaller01009 ser2pl.dll: This issue arises when Windows cannot load the DLL file, which can result in application crashes or system instability.

File Security

The "wdfcoinstaller01009 ser2pl.dll" is generally considered safe and is part of the Windows operating system. However, if you receive unexpected errors or suspect your system might be compromised, it's always best to verify its integrity using official sources.

wdfcoinstaller01009 ser2pl.dll was not found
The code execution cannot proceed because wdfcoinstaller01009 ser2pl.dll was not found
Failed to load wdfcoinstaller01009 ser2pl.dll
The procedure entry point ... could not be located in wdfcoinstaller01009 ser2pl.dll

1.
2a. 👉 Try to copy wdfcoinstaller01009 ser2pl.dll C:\Program Files\Your program\
2b. Also try to copy to bin, lib folders.
2c. Try to copy wdfcoinstaller01009 ser2pl.dll C:\Program Files (x86)\Your program\
👉 Before file replacement, ensure backups are made.
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

  1. Reinstall the Program: Often, reinstalling the application or driver that uses this DLL can resolve issues. Ensure you are downloading from an official source.
  2. Update Windows: Make sure your operating system is up-to-date. Sometimes, updates include fixes for known DLL issues.
  3. Manually Replace wdfcoinstaller01009 ser2pl.dll: If you want to manually replace the file, download it from a trusted source and place it in its original location. Be cautious with this step as incorrect replacement can cause more harm than good.

FAQ

Q: What does wdfcoinstaller01009 ser2pl.dll do?

A: It is a system file used for the installation and setup of certain hardware components in Windows.

Q: How can I fix "wdfcoinstaller01009 ser2pl.dll not found" errors?

A: Reinstalling the relevant software or driver, updating Windows, or manually replacing the file might help resolve these issues.

Q: Is wdfcoinstaller01009 ser2pl.dll safe?

A: Generally yes, but verify its authenticity if you encounter unexpected errors or suspect it may be compromised.

Conclusion

The "wdfcoinstaller01009 ser2pl.dll" file is a critical component for certain hardware installations in Windows. Ensuring its integrity and updating your system can help prevent issues related to this DLL.


File Description and Location

  • File Name: wdfcoinstaller01009 ser2pl.dll
  • Description: This is a Windows Driver Framework (WDF) Co-installer file. It is specifically bundled with the Prolific PL2303 USB-to-Serial controller driver. It ensures the driver installs correctly using the correct framework version (01009 translates to version 1.9).
  • Standard Location: C:\Windows\System32\drivers\ or inside the specific driver installation folder in C:\Windows\System32\DriverStore\FileRepository\.

How to Fix the Error Without Downloading Anything

Errors related to this file usually happen because the Prolific USB-to-Serial driver is corrupted, outdated, or blocked by Windows updates. You can fix this using built-in Windows tools.

Method 1: Reinstall the Driver via Device Manager

Windows keeps a backup cache of working drivers. You can force it to reinstall the file.

  1. Press Win + X and select Device Manager.
  2. Expand the Ports (COM & LPT) section.
  3. Right-click your Prolific USB-to-Serial Comm Port and select Uninstall device.
  4. Check the box that says “Attempt to remove the driver for this device” and click Uninstall.
  5. Unplug your USB-to-Serial adapter and plug it back in. Windows will automatically rebuild the file from its internal repository.

Method 2: Roll Back to an Older Driver Version

Newer Windows updates sometimes break compatibility with older Prolific chips, causing this DLL to fail.

  1. Open Device Manager and find your device under Ports (COM & LPT).
  2. Right-click it and select Properties.
  3. Go to the Driver tab.
  4. Click Roll Back Driver if the option is available, then click OK.

Method 3: Run System File Checker (SFC)

If the file in the Windows system directory is corrupted, the built-in system repair tool will fix it.

  1. Type cmd in the Windows search bar.
  2. Right-click Command Prompt and choose Run as administrator.
  3. Type sfc /scannow and press Enter.
  4. Wait for the scan to finish and restart your computer.

?? If you'd like to troubleshoot further, let me know:

  • What error message or error code are you seeing?
  • What hardware device are you trying to connect?
  • Which Windows version are you currently running?
Other versions:
️ wdfcoinstaller01009_ser2pl.dll 1.9.7600.16385 32-bit (x86)
Microsoft Corporation