如何修复win PC上的' DNS服务器不响应”

首先通过刷新DNS缓存和重置网络设置来解决“DNS服务器未响应”问题：1. 以管理员身份运行命令提示符；2. 依次输入并执行以下命令：ipconfig /flushdns、ipconfig /release、ipconfig /renew、netsh winsock reset、netsh int ip reset，完成后重启电脑，网络设置将恢复默认并清除损坏的DNS缓存，从而解决大部分DNS连接问题。

The "DNS server isn't responding" error on a Windows PC usually means your computer can't communicate with the Domain Name System (DNS) server to load websites. While your internet might be working, you can't reach sites by name. Here’s how to fix it quickly and effectively.

1. Restart Your Router and Computer

Before diving into technical fixes, try the basics:

• Turn off your PC and your router/modem.
• Wait 30 seconds, then power on the router and wait for it to fully reconnect.
• Restart your computer.

This often resolves temporary network glitches, including DNS communication issues.

2. Flush DNS and Reset Network Settings

Windows stores DNS info locally. Corrupted cache or misconfigured settings can cause the error.

Open Command Prompt as Administrator (search for cmd, right-click > Run as administrator), then run these commands one at a time:

ipconfig /flushdns
ipconfig /release
ipconfig /renew
netsh winsock reset
netsh int ip reset

After running all commands, restart your PC.

This clears outdated DNS entries and resets TCP/IP stack and Winsock settings, which are common culprits.

3. Change to a Public DNS Server

Your ISP’s DNS server might be down or slow. Switching to a reliable public DNS like Google DNS or Cloudflare often fixes the issue.

Steps:

1. Press Win I → Go to Network & Internet → Wi-Fi or Ethernet (depending on connection).
2. Click your network → Hardware properties → Scroll to DNS server assignment → Click Edit.
3. Choose Manual (not Automatic).
4. Toggle IPv4 on and enter:
   • Preferred DNS: 8.8.8.8
   • Alternate DNS: 8.8.4.4(These are Google’s DNS servers. You can also use Cloudflare: 1.1.1.1 and 1.0.0.1)
5. Save and test your connection.

This bypasses your ISP’s unreliable DNS and often restores browsing instantly.

4. Disable IPv6 (Temporarily)

Sometimes IPv6 settings interfere with DNS, especially if your network doesn’t fully support it.

How to disable:

1. Go to Network & Internet Settings → Change adapter options.
2. Right-click your active network → Properties.
3. Uncheck Internet Protocol Version 6 (TCP/IPv6).
4. Click OK and restart your browser.

Test the connection. If it works, the issue was IPv6-related. You can re-enable it later if needed.

5. Update or Reinstall Network Driver

Outdated or corrupted network drivers can prevent proper DNS communication.

Update driver:

1. Press Win X → Device Manager.
2. Expand Network adapters.
3. Right-click your network adapter → Update driver → Search automatically.

If that doesn’t help, try:

• Uninstalling the driver (right-click → Uninstall device), then restart your PC. Windows will reinstall it automatically.

6. Temporarily Disable Firewall or Antivirus

Overly aggressive security software can block DNS requests.

• Turn off third-party antivirus/firewall (e.g., Norton, McAfee) temporarily.
• Test your internet.

If the error disappears, adjust the firewall settings or consider switching to a less intrusive security tool.

Don’t leave your system unprotected—only disable for testing.

Final Notes

Most "DNS server isn't responding" issues are resolved by flushing DNS switching to Google DNS. If the problem persists across multiple devices, the issue might be your router or ISP—try resetting the router to factory settings or contacting your provider.

Basically, start simple, then work up to network settings and drivers. It’s usually not as complex as it seems.

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