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markdown"><header><h1>故障代码720</h1></header>
<p>...</p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="现象">现象<a href="#现象" class="hash-link" aria-label="Direct link to 现象" title="Direct link to 现象"></a></h2>
<p>联通宽带拨号失败,提示错误代码<code>720</code></p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="原因">原因<a href="#原因" class="hash-link" aria-label="Direct link to 原因" title="Direct link to 原因"></a></h2>
<ul>
<li>网络协议崩溃</li>
</ul>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="简单粗暴的解决方法">简单粗暴的解决方法<a href="#简单粗暴的解决方法" class="hash-link" aria-label="Direct link to 简单粗暴的解决方法" title="Direct link to 简单粗暴的解决方法"></a></h2>
<ol>
<li>计算机-管理-设备管理器-网络适配器-查看-右键带有“IPV6”的适配器-卸载</li>
<li>重新拨号</li>
<li>解决</li>
</ol>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="常规解决方法">常规解决方法<a href="#常规解决方法" class="hash-link" aria-label="Direct link to 常规解决方法" title="Direct link to 常规解决方法"></a></h2>
<ol>
<li>使用通用拨号错误解决方案尝试解决(见页末)</li>
<li>网络和共享中心-更改适配器设置,将拨号配置全部删除,将本地连接/以太网全部禁用</li>
<li>计算机-管理-设备管理器-网络适配器-查看-显示隐藏的设备,将网络适配器/网卡驱动全部卸载</li>
<li>重启计算机使用U盘重装网卡驱动</li>
<li>使用通用拨号错误解决方案尝试解决</li>
<li>如果用户电脑装有McAfee安全软件卸载McAfee</li>
<li>建议用户早日放弃治疗重装吧</li>
</ol>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="720错误转为813错误解决方法">720错误转为813错误解决方法<a href="#720错误转为813错误解决方法" class="hash-link" aria-label="Direct link to 720错误转为813错误解决方法" title="Direct link to 720错误转为813错误解决方法"></a></h2>
<ol>
<li>计算机-属性-设备管理器-网络适配器将所有WAN开头的设备卸载</li>
<li>重新连接如果错误代码变为813则可以开始使用813错误的解决方法如果使用此方法一次仍然失败请多尝试几次<!-- -->
<ul>
<li>附上813的解决方法<!-- -->
<ol>
<li>删掉没用的宽带连接,重建宽带连接</li>
<li>跑神器,重启</li>
<li>打开命令行,输入<code>rasdial /DISCONNECT</code>,重启(必须重启)</li>
<li>重建连接</li>
</ol>
</li>
</ul>
</li>
</ol>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="由卸载旧版本猎豹wifi导致解决方法">由卸载旧版本猎豹WIFI导致解决方法<a href="#由卸载旧版本猎豹wifi导致解决方法" class="hash-link" aria-label="Direct link to 由卸载旧版本猎豹WIFI导致解决方法" title="Direct link to 由卸载旧版本猎豹WIFI导致解决方法"></a></h2>
<ol>
<li>计算机-属性-设备管理器-查看-显示隐藏的设备</li>
<li>点开网络适配器,查看里面有叹号的设备(WAN微型端口)</li>
<li>选择有叹号的设备-右键-更新驱动程序软件</li>
<li>更新驱动程序软件-你希望如何搜索驱动程序软件-浏览计算机以查找驱动程序软件-从计算机的设备驱动管理程序列表中选取-选择网络适配器-去掉显示兼容硬件的勾-厂商:Microsoft--网络适配器<!-- -->:Microsoft<!-- --> KM-TEST 环回适配器-下一步</li>
<li>返回网络适配器看到有个叹号名为“Microsoft KM-TEST 环回适配器”,然后右键卸载</li>
<li>对所有有感叹号的设备重复以上操作,重启电脑</li>
</ol>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="通用拨号错误解决方案">通用拨号错误解决方案<a href="#通用拨号错误解决方案" class="hash-link" aria-label="Direct link to 通用拨号错误解决方案" title="Direct link to 通用拨号错误解决方案"></a></h2>
<ol>
<li>计算机-管理-设备管理器-网络适配器,依次禁用再启用各个网络适配器</li>
<li>网络和共享中心-更改适配器设置,依次禁用再启用各个本地连接/以太网,删除所有宽带连接并尝试重建</li>
<li>确认本地连接/以太网-属性-Internet协议版本4(TCP/IPv4)-属性选中自动获取IP地址自动获得获得DNS服务器地址</li>
<li>右键管理员运行命令提示符(cmd.exe),执行<!-- -->
<ol>
<li><code>netsh winsock reset</code></li>
<li><code>ipconfig /release</code></li>
<li><code>ipconfig /renew</code></li>
</ol>
</li>
<li>运行U盘携带的神器(winsockfix.exe)</li>
<li>重启计算机</li>
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