Java Uninstaller for Windows

Script for the complete, automated removal of Java from Windows 10 and Windows 11: it closes running processes, uninstalls packages, cleans up leftover folders, registry keys, the JAVA_HOME variable, and Java entries in PATH.

📦 Project files

File	Description
uninstall-java.bat	Main script, run this one
uninstall-java.ps1	PowerShell module invoked by the batch script (must stay in the same folder)

✨ Features

• ✅ Compatible with Windows 10 and Windows 11
• ✅ Automatic administrator elevation, with anti-loop protection
• ✅ Explicit confirmation required before proceeding (Y/N)
• ✅ Automatically closes active Java processes (java.exe, javaw.exe, javaws.exe)
• ✅ Uninstalls via winget (Java, OpenJDK, Eclipse Temurin, Zulu)
• ✅ Uninstalls via PowerShell (Get-Package / Uninstall-Package)
• ✅ Silently uninstalls via native registry Uninstall entries, matched by DisplayName (covers MSI installers too, not just winget/Get-Package)
• ✅ Removes leftover folders (Oracle, Adoptium, Zulu, AdoptOpenJDK)
• ✅ Cleans up JavaSoft registry keys
• ✅ Removes the JAVA_HOME environment variable (system and user)
• ✅ Cleans up Java-related entries in PATH (system and user)
• ✅ Detailed log of the operation (uninstall-java-log.txt)

🚀 Usage

1. Download both files (uninstall-java.bat and uninstall-java.ps1) into the same folder
2. Right-click uninstall-java.bat and choose "Run as administrator" (or just run it normally — it will request elevation on its own)
3. Confirm the operation when prompted (Y/N)
4. Wait for the process to complete
5. Restart your PC to apply the changes

⚠️ Warning: this script removes all Java versions installed on the system, including any OpenJDK/Temurin/Zulu distributions. Make sure you don't have applications depending on Java before running it.

📋 Requirements

• Windows 10 or Windows 11
• winget installed (included by default on Windows 11 and recent Windows 10 builds) — if missing, the script automatically skips this step without raising errors
• Administrator privileges

📄 Log

A uninstall-java-log.txt file is generated in the same folder as the script once execution completes, useful for checking which components were actually removed or whether any errors occurred.

🛠️ How it works

1. Close processes – terminates any running Java processes to avoid locked files
2. Winget – uninstalls the most common Java packages (if winget is available on the system)
3. PowerShell (uninstall-java.ps1) – removes packages detected via Get-Package, finds registry Uninstall entries with a DisplayName matching Java/JDK/JRE/OpenJDK/Temurin/Zulu and silently uninstalls them (handling both MSI and NSIS/InstallShield installers), then cleans up PATH from any Java references
4. File system cleanup – deletes leftover Oracle/OpenJDK/Temurin/Zulu folders
5. Registry and environment cleanup – removes the JavaSoft keys and the JAVA_HOME variable

🤝 Contributing

Pull requests and issue reports are welcome! If you find a Java path or installer not covered by the script, please open an issue.

📜 License

Distributed under the MIT license.

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Made by lorenzocaputodev