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我试图在我的 Windows XP 机器上摆脱旧版本的 Java（因为我仍然有 1.6，我也有 1.7）。卸载 1.6 后，我收到有关 Java 运行时环境的错误。当我尝试启动 Java 控制面板时，它给了我这个错误：

系统找不到指定的注册表项：

HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft\Java 运行时环境\1.7.0_05

我试图重新安装 Java，但什么也没做。而且我无法完全删除 Java，因为每当我尝试时，它都会给我一个错误，说安装中有错误。再具体一点：

安装过程中出现致命错误。

知道如何解决这个问题吗？它使我无法做很多令人沮丧的事情。

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Author's note: This answer was written to address installations of Java, major versions 6 and 7. It may or may not work with versions of java that are newer or older, but it probably won't hurt to try. If you follow these instructions for a major version not listed, please comment whether you were successful or not.

  1. Read all of the directions twice. This solution details a manual uninstall of java by modifying the windows registry. If you do not follow the directions, you can cause permanent damage to your windows installation and will need serious firepower to get it working correctly again. If you do not understand the risks, ask someone for help.

  2. If you have any registry cleaners, get rid of them. This is probably their fault. I've never met one I liked and wouldn't let one touch my registry with a 10 foot read only pole.

  3. If you're using a laptop, connect to a charger. If you have children, make them walk the dog. Find a quiet secluded place and hole yourself up in it with zero distractions for about 15 minutes.

  4. Make a backup of the registry key "\HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft", save it somewhere safe.

  5. Delete exactly the following and only exactly the following registry key and all of its subkeys: "\HKEY_LOCAL_MACHINE\SOFTWARE\JavaSoft". After you are done with this step, java is dead. Do not try to run any java programs at this stage, it almost certainly won't work.

  6. Open "C:\Program Files" (and, if you're on a 64 bit machine, "C:\Program Files (x86)"). If you see folders called Java, rename them to "Java_". If you installed java to a nonstandard location, navigate to it and add an underscore to its name.

  7. Download and install the latest version. The installation should complete with no issues. It should also overwrite any leftover chunks of the old installation that are left.

  8. (optional) Uninstall java again. The uninstallation should go smoothly and it should properly dispose of any leftover resources installed by the broken installation. Reinstall when the uninstall is complete. Since you are installing the same version you just removed, this probably isn't necessary.

Final note: I have performed this surgery many times on other people's computers using teamviewer, and it has never gone wrong. In the social circles where I hang out, we call it a javaectomy. For reference, I hang out on IRC and help people with issues with minecraft. We think we have seen every possible java issue. This one is fairly common and caused by some combination of many concurrent java versions, registry cleaners, and interrupted or failed updates. Once you are done and have verified that the reinstallation has gone smoothly and without issues, you can remove your saved registry keys and delete the renamed java folders from "program files" and "program files (x86)" (remember to delete only the ones with an appended underscore, the one called Java was added by the reinstall and should be left as is.

Disaster recovery: In the unlikely event that something goes wrong, restore the renamed java folders and patch the registry keys with your backup to revert to the original (partially broken) state.

于 2012-07-09T21:19:11.663 回答
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我必须祝贺 Wug 在去除旧 Java 残留物方面做出的贡献。我尝试了所有可用的卸载程序（免费）但无济于事。除了警告之外，Wug 建议的所有内容都有效。唯一需要注意的是，在 #6（在 Program Files 中重命名 Java 文件夹）之后，您必须使用 Windows 卸载程序。为什么？因为如果您尝试安装下载的 Java，它会警告您已经安装了 Java。从添加或删除程序（控制面板）运行卸载程序。它会给你一个找不到卸载程序的错误，然后它会从“添加/删除程序”中删除 Java 引用。然后安装下载的 Java 文件，您就摆脱了旧的 Java 引用。

干得好，哇！！

于 2014-01-28T07:31:18.743 回答
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我在我的机器上更新Java 到1.8. 我在安装时选择了卸载现有版本，它对注册表项做了一些事情。这个修复对我有用。

  1. 从您的机器上卸载所有版本的 JDK 和 JRE。
  2. 重新启动它。
  3. 安装 1.7 JDK。
  4. 然后安装你想要的任何JDK。
于 2018-09-11T13:57:53.910 回答