Software⏱️ 3 min read📅 2026-06-19

How to Fix: How to get rid of program whose uninstall throws NSIS error?

How to uninstall OpenVPN on Windows with NSIS error.

Quick Answer: Try using the 'Programs and Features' app in Control Panel or the 'Uninstall' option from the Start menu.

📋 Table of Contents

  1. 💡 Why You Are Getting This Error
  2. 🚀 How to Resolve This Issue
  3. 🎯 Final Words

The NSIS error occurs when attempting to uninstall a program that was installed using the Nullsoft Scriptable Install System. This error is typically caused by corrupted installation files or incomplete removal of program components during the uninstallation process. The OpenVPN 2.4.x version you installed may have been unstable, leading to this issue.

Uninstalling a program with an NSIS error can be frustrating, especially when trying to remove outdated software. However, don't worry; in this guide, we'll walk you through the steps to resolve this issue and safely uninstall OpenVPN from your Windows 10 system.

💡 Why You Are Getting This Error

  • The primary reason for the NSIS error is that the installation files are corrupted or incomplete. This can happen when the uninstallation process is interrupted or not fully completed. Additionally, some programs may leave behind residual files during uninstallation, causing errors like this.
  • Another possible cause of the NSIS error is that the program's uninstaller is malfunctioning due to a conflict with other installed software or system issues.

🚀 How to Resolve This Issue

Manually deleting installation files and using the Windows built-in tool

  1. Step 1: Locate the OpenVPN installation directory on your system. This can usually be found in the 'Program Files' or 'ProgramData' folders under the 'OpenVPN' subfolder.
  2. Step 2: Delete all the files and subfolders inside the installation directory using a file explorer or command prompt. Be cautious not to delete any other important files or programs during this process.
  3. Step 3: After deleting the installation files, open the Control Panel and navigate to the 'Programs and Features' section. Look for OpenVPN in the list of installed programs and select it to begin the uninstallation process.

Using a third-party uninstaller

  1. Step 1: Download and install a reputable third-party uninstaller, such as CCleaner or Revo Uninstaller. These tools can help remove OpenVPN files and components more effectively than the built-in Windows tool.
  2. Step 2: Launch the uninstaller and select OpenVPN from the list of installed programs. Follow the prompts to begin the uninstallation process.

🎯 Final Words

To get rid of a program whose uninstall causes an NSIS error, you can try manually deleting installation files and using the Windows built-in tool or use a third-party uninstaller. Be sure to back up any important data before proceeding with the uninstallation process.

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