在网上找了一堆的文章，都没有解决我的问题，最后Google了一把，还是利用symantec自己出的工具（CleanWipe.zip）把它卸载了。正所谓解铃还需系铃人啊，太无耻了。
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要下载一个工具CleanWipe.zip来卸载，然后打开工具，一路下一步，选择那三个要卸载的框，再下一步，再选择自动重启的框，再下一步就开始卸载了，重启后会自动运行工具继续卸载，直到提示完成。
To download the utility, open the following web page in a browser:
https://fileshare.symantec.com
Log in with the following information:
Login ID: cleanwipeutility
Password: CL3@nw!p3
Once you have downloaded the utility, please follow these instructions.
Note: The .zip file may be password protected.
Un-Zip Password: symantec
1. Extract the file to a new folder in a convenient location, such as the Desktop, using the un-zip password provided above.
2. Browse to the new folder and execute the utility by double clicking ‘CleanWipe.exe’
3. Follow the on-screen instructions.
The utility runs in verbose mode and will ask you about the components you want uninstalled.
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原文链接：强制卸载symantec，转载请注明来源！