有网但是打不开浏览器是由于浏览器的网页的代理服务器出现了故障，只需要使用360安全卫士的修复功能进行修复即可，具体的操作步骤如下：
1、打开360安全卫士，选择点击右下角的“人工服务”。
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2、在弹出的搜索框中，然后输入问题“网页打不开”。
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3、查找解决问题的方案，然后点击立即修复。
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4、等待修复完成，接着重启电脑即可正常上网了。
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注意事项：
1、在查找解决问题的时候，需要选择对应的问题，即网页无法打开进行修复，否则也会对该修复没有用。
2、若是修复之后依然无法上网，则有可能是DNS地址出现问题。