SOLVED: How to Manually Uninstall Java

One of our clients had a Java uninstall go “badly” and now the install is broken. Java is a significant security risk so the client asked us to manually remove it.

We tried:

• the uninstall process via APPS AND FEATURES
• the Oracle Java Uninstall Tool
• In-place upgrade (installing the same version of Java over top of the current version)

but all failed, so we had to go very manual.

How To Uninstall Java Manually

1 – Stop Any Java Services

Look at SERVICES.MSC for anything JAVA or ORACLE JAVA related, stop those services and set them to MANUAL start

2 – Delete These Folders

• C:\Program Files\Java\jre*
• C:\ProgramData\Oracle\Java
• C:\Program Files (x86)\Common Files\Oracle\Java
• C:\Users\<YourUsername>\AppData\LocalLow\Sun\Java

3 – Delete These Registry Entries

• HKCU\Software\JavaSoft
• HKLM\SOFTWARE\JavaSoft\Java Runtime Environment
• HKLM\SOFTWARE\Microsoft\Windows\CurrentVersion\Uninstall\{Java-related key}
  and
  HKLM\SOFTWARE\WOW6432Node\Microsoft\Windows\CurrentVersion\Uninstall\{Java-related key}
  • If you don’t know what the JAVA RELATED KEY is, look at THIS script.
• HKLM\SYSTEM\CurrentControlSet\Services\ anything JAVA related
  • like JavaQuickStarterService

Then reboot and have a nice day.