Is it safe to delete Java folders from C:\Users\(Username)\AppData\LocalLow\Sun\Java

Question

I am using a Windows 7 64-bit PC. I have many folders in C:\Users\(Username)\AppData\LocalLow\Sun\Java with names of older Java versions like:

• jdk1.7.0_21_x64
• jre1.7.0_45
• jre1.7.0_25

These folders contain .msi and .cab files. I have uninstalled all older versions of Java but these folders are still in that location.

Do I need those? Or is it safe to delete?

Answer 1

Yes, if you've already uninstalled them, this is safe to do.

Also, you may find Oracle's Java Uninstall Tool helpful.

Answer 2

Based on the this bug report, I removed the files in C:\Users\(Username)\AppData\LocalLow\Sun\Java after installation. Java continued to work as it should. It became impossible to remove, using Add/Remove Programs, any version whose files I had deleted.

It seems that these files are only kept around for uninstallation. Java Uninstall Tool mentioned in Jason's answer probably alleviates the need to keep those files around.

Answer 3

Recommend to nuke the folder C:\Users\username\AppData\LocalLow\Sun\Java

There were 12 different versions of java in mine, from 1.6.26 to 1.8.31.

All these java versions are obsolete and past end-of-life. They have extremely serious unpatched security vulnerabilities. Better nuke them to orbit.

They were most likely installed by some software that tried to embed or auto-install java half-assedly. They will never get upgraded.

The java uninstallation tool suggested in the top answer is long dead https://www.java.com/en/download/uninstallapplet.jsp. It's a java applet, browsers have been totally blocking java for years due to recurring security issues. You can try opening in Internet Explorer but it should be broken.