**How to Fix wlansec.dll Missing Error (Solved)**
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**1. What is wlansec.dll?**
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`The `wlansec.dll` file is a Dynamic Link Library (DLL) file that plays a significant role in the Windows operating system, particularly with Wi-Fi security settings and wireless network connectivity. It provides essential functions to other applications within the system for secure Wi-Fi communications.
**2. Why is wlansec.dll missing?**
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`There are several reasons why the `wlansec.dll` file might be missing or not functioning correctly:
– **Malware Infection:** Malicious software can corrupt, delete, or interfere with system files, including DLLs like `wlansec.dll`.
– **Accidental Deletion:** Users may accidentally delete the file during the course of routine system maintenance or while trying to resolve other issues within the Windows operating system.
**3. Step-by-Step Fixes:**
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`Method 1: Reinstall Visual C++ Redistributable
If the `wlansec.dll` file is missing due to an issue with Visual C++, you can attempt to reinstall the Visual C++ Redistributable package. Here’s how:
1. Visit the official Microsoft Download Center at [https://www.microsoft.com/en-us/download/details.aspx?id=48209](https://www.microsoft.com/en-us/download/details.aspx?id=48209)
2. Download and install the appropriate Visual C++ Redistributable package for your system architecture (32-bit or 64-bit).
3. Restart your computer after installation is complete.
**Method 2: Run SFC /scannow command**
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`Running the System File Checker (SFC) tool with the `/scannow` option can help to repair corrupted system files, including `wlansec.dll`. To do this, follow these steps:
1. Press Windows key + X and select “Command Prompt” (Admin).
2. Type the following command and press Enter:`sfc /scannow`
3. Wait for the scanning process to complete. It may take several minutes.
4. Restart your computer after the scan is finished.
**Method 3: Update System Drivers**
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`Outdated drivers can cause issues with system files like `wlansec.dll`. To ensure that your system drivers are up-to-date, follow these steps:
1. Press Windows key + X and select “Device Manager”.
2. In the Device Manager window, locate the network adapters category and expand it by clicking on the arrow icon next to it.
3. Right-click on your wireless adapter and select “Update driver”.
4. Choose “Search automatically for updated driver software” and follow the prompts to complete the update process.
5. Restart your computer after the update is finished.
**4. Conclusion**
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`Missing or corrupted `wlansec.dll` files can cause issues with Wi-Fi connectivity in Windows. By following the step-by-step fixes outlined above, you should be able to resolve the issue and restore your wireless network functionality. If these methods fail to solve the problem, it is recommended to seek further assistance from a professional or contact Microsoft Support for additional troubleshooting steps.