How to Fix AppxSip.dll Missing Error (Solved)

What is AppxSip.dll?

AppxSip.dll, short for Application Specific Pass-Thru SIP Protocol Stack, is a Dynamic Link Library (DLL) file in Windows operating system. This crucial file is responsible for managing various functions within applications that use the Session Initiation Protocol (SIP). When this file goes missing or becomes corrupted, it can cause numerous issues with software applications that rely on it.

Why is AppxSip.dll Missing?

Common reasons for the AppxSip.dll error include malware infections that may delete or corrupt files, accidental deletion of the file during routine system maintenance, and updates or installation of programs that require this specific file but fail to provide it.

Step-by-Step Fixes:

Method 1: Reinstall Visual C++ Redistributable

The AppxSip.dll file is associated with Microsoft Visual C++, so reinstalling the redistributable package can help resolve the issue.

1. Visit the official Microsoft Download Center (link).
2. Download the appropriate version of Visual C++ Redistributable based on your system architecture (x64 or x86).
3. Run the installation file and follow the prompts to complete the reinstallation process.

Method 2: Run SFC /scannow command

The System File Checker (SFC) is a built-in tool in Windows that can help repair corrupted system files. Running the SFC /scannow command can potentially restore the missing AppxSip.dll file.

4. Open Command Prompt as an administrator (Windows key + X, then select “Command Prompt (Admin)”).
5. Type the following command and press Enter:

sfc /scannow

Let the scan complete and follow any on-screen instructions to repair detected issues.

Method 3: Update System Drivers

Outdated system drivers may cause conflicts with other files, including AppxSip.dll. Updating your system drivers can help resolve the issue.

7. Press Windows key + X, then select “Device Manager.”
8. Expand the category for the device you’re updating (e.g., Network Adapters or Sound, video and game controllers).
9. Right-click on the device you want to update and select “Update Driver” from the context menu.
10. Choose “Search automatically for updated driver software.”

Follow any on-screen instructions to complete the driver update process.

Conclusion

The AppxSip.dll error can be frustrating, but with these step-by-step fixes, you should be able to resolve the issue and get your applications running smoothly once more. If the problem persists after attempting these solutions, consider seeking further assistance from a qualified IT professional.