打开瑞星防火墙后,点软件升级,弹出一个信息框:An error occurred while reading the configuration file. Please try to repair the file using Add/Remove Programs in the Windows Control Panel and try again.然后我打开控制面版,打开添加/删除程序,找到瑞星防火墙后点更改/删除按钮后,出现一个信息:No valid config,怎么也删不掉防火墙。请教高手该如何删掉防火墙，以便重新安装一下。谢谢

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