如果存在 Internet 连接问题，可以尝试重置 TCP/IP。 本文介绍了重置 TCP/IP 的两种方法。
自动重置 TCP/IP
若要自动重置 TCP/IP，请选择“ 下载 ”按钮。 在“ 文件下载 ”对话框中，选择“ 运行 ”或 “打开”，然后按照简易修复向导中的步骤进行作。
注释
此向导可能只提供英文版本。 但是，自动修复功能同样适用于其他语言版本的 Windows。
如果你不在有问题的计算机上，请将简易修复解决方案保存到闪存驱动器或 CD，然后在有问题的计算机上运行它。
手动重置 TCP/IP
若要手动重置 TCP/IP，请执行以下步骤：
在“开始” 屏幕中，键入“cmd” 。 在搜索结果中，右键单击 命令提示符，然后选择“ 以管理员身份运行”。
在命令提示符处输入以下命令，然后按 Enter：
netsh int ip reset c:\resetlog.txt
注释
如果不想指定日志文件的目录路径，请改为运行以下命令： netsh int ip reset resetlog.txt
重启电脑
运行重置命令时，它会覆盖以下注册表项，这两个注册表项均由 TCP/IP 使用：
SYSTEM\CurrentControlSet\Services\Tcpip\Parameters
SYSTEM\CurrentControlSet\Services\DHCP\Parameters
这与删除和重新安装 TCP/IP 的效果相同。 若要成功运行手动命令，必须为要在其中记录 netsh作的日志文件指定名称。 （本部分前面的手动过程中将此日志文件称为 resetlog.txt 。
注释
必须以管理员身份登录到计算机才能执行这些步骤。
详细信息
问题是否已修复？ 检查问题是否已修复。 如果是，你已完成本文。 如果问题未解决，可以 联系支持人员。
Netsh int IP 重置的示例日志文件
下面是发出 IP 重置命令时由 netsh 生成的日志文件示例。 实际日志文件可能会有所不同，具体取决于计算机的配置。 当 TCP/IP 注册表项未从其原始配置中更改时，该文件中可能不会记录任何作。
reset SYSTEM\CurrentControlSet\Services\Dhcp\Parameters\Options\15\RegLocation
old REG_MULTI_SZ =
SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\?\DhcpDomain
SYSTEM\CurrentControlSet\Services\TcpIp\Parameters\DhcpDomain
added SYSTEM\CurrentControlSet\Services\Netbt\Parameters\Interfaces\Tcpip_{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\NetbiosOptions
added SYSTEM\CurrentControlSet\Services\Netbt\Parameters\Interfaces\Tcpip_{BAA9D128-54BB-43F6-8922-313D537BE03E}\NetbiosOptions
reset SYSTEM\CurrentControlSet\Services\Netbt\Parameters\Interfaces\Tcpip_{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\NameServerList
old REG_MULTI_SZ =
10.1.1.2
deleted SYSTEM\CurrentControlSet\Services\Netbt\Parameters\EnableLmhosts
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\AddressType
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\DefaultGatewayMetric
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\DisableDynamicUpdate
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\DontAddDefaultGateway
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\EnableDhcp
old REG_DWORD = 0
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\NameServer
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\RawIpAllowedProtocols
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\TcpAllowedPorts
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{2DDD011E-B1B6-4886-87AC-B4E72693D10C}\UdpAllowedPorts
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\DisableDynamicUpdate
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\EnableDhcp
old REG_DWORD = 0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\IpAddress
old REG_MULTI_SZ =
12.12.12.12
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\IpAutoconfigurationAddress
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\IpAutoconfigurationMask
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\IpAutoconfigurationSeed
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\RawIpAllowedProtocols
old REG_MULTI_SZ =
0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\SubnetMask
old REG_MULTI_SZ =
255.255.255.0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\TcpAllowedPorts
old REG_MULTI_SZ =
0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{5B3675C3-6EB9-4936-B991-04DA31024C4E}\UdpAllowedPorts
old REG_MULTI_SZ =
0
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\AddressType
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\DefaultGatewayMetric
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\DisableDynamicUpdate
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\DontAddDefaultGateway
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\EnableDhcp
old REG_DWORD = 0
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\NameServer
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\RawIpAllowedProtocols
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\TcpAllowedPorts
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BAA9D128-54BB-43F6-8922-313D537BE03E}\UdpAllowedPorts
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\DefaultGateway
old REG_MULTI_SZ =
10.1.1.2
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\DefaultGatewayMetric
old REG_MULTI_SZ =
0
added SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\DisableDynamicUpdate
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\EnableDhcp
old REG_DWORD = 0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\IpAddress
old REG_MULTI_SZ =
10.1.1.1
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\IpAutoconfigurationAddress
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\IpAutoconfigurationMask
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\IpAutoconfigurationSeed
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\NameServer
old REG_SZ = 10.1.1.2,10.1.1.3
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\RawIpAllowedProtocols
old REG_MULTI_SZ =
0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\SubnetMask
old REG_MULTI_SZ =
255.255.255.0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\TcpAllowedPorts
old REG_MULTI_SZ =
0
reset SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\Interfaces\{BD2859BA-B26A-4E2B-A3FE-3D246F90A81A}\UdpAllowedPorts
old REG_MULTI_SZ =
0
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\DontAddDefaultGatewayDefault
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\EnableIcmpRedirect
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\EnableSecurityFilters
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\SearchList
deleted SYSTEM\CurrentControlSet\Services\Tcpip\Parameters\UseDomainNameDevolution
有关详细信息，请参见:
第 16 章 - TCP/IP 故障排除
适用于 Windows 的 TCP/IP 和 NBT 配置参数