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安装mysql出错：a windows service with the name mysql already...service解决
今天把mysql5.1卸载了，想装个5.5，安装时提示：a windows service with the name mysql already exists.please uninstall this service correctly or choose a different name for the new service.
可以尝试删除残留的注册表信息hkey_local_machine/system/currentcontrolset/services下面找到mysql注册表信息把它整个删掉后，重装mysql成功了！
过了这步到启动service时又提示：cannot create windows service for mysql.error:0
win+r进入cmd命令行：
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microsoft windows [版本 6.1.7600]
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c:/users/stone>sc delete mysql
[sc] deleteservice 成功
c:/users/stone>
之后就搞定了！
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