1.確保啟用了遠程桌面：在目標計算機上啟用遠程桌面功能，並確認用戶賬戶有權訪問。 2.檢查網(wǎng)絡和防火牆設置：確保設備在同一網(wǎng)絡，嘗試ping測試，允許遠程桌面通過防火牆。 3.使用正確的IP地址和端口：輸入正確的IP地址及端口號（默認3389），注意區(qū)分公網(wǎng)IP、局域網(wǎng)IP及IPv4/IPv6。4.排查高級問題：檢查遠程桌面服務是否運行，是否存在組策略限制，嘗試新建.rdp文件並更新Windows系統(tǒng)。若仍無法連接，請複查每一步設置是否有誤。

If you're trying to connect via Remote Desktop on Windows and it's not working, there are a few common issues that could be causing the problem. It might be something simple like network settings or firewall rules — or maybe the remote computer isn't configured correctly for remote access.

Let's go through the most likely causes and how to fix them.

1. Make Sure Remote Desktop Is Enabled

First things first — is Remote Desktop actually turned on?

• On the computer you're trying to connect to , go to Settings > System > Remote Desktop .
• Toggle it on.
• You should see a message saying "Remote Desktop is enabled for this device."

If you don't see that message, click the link under “How to enable Remote Desktop” or make sure your version of Windows supports it (not all versions do — Home editions usually don't).

Also, check that the user account you're using has permission to connect:

• Go to Control Panel > System > Remote Settings
• Under the Remote tab, make sure the option “Allow remote connections to this computer” is selected
• Check the list under “Remote Desktop Users” to confirm your account is included

2. Check Network and Firewall Settings

Even if Remote Desktop is enabled, firewalls or network settings can block the connection.

• Make sure both devices are on the same network — especially if you're testing locally.
• Try pinging the remote machine by its IP address to see if it's reachable:

   ping [IP Address]

  If it doesn't respond, there's a network issue before even getting to RDP.

Firewall-related fixes:

• On the remote PC, open Control Panel > Windows Defender Firewall > Allowed apps , and make sure Remote Desktop is checked for both private and public networks.
• Or temporarily disable the firewall (for testing only!) to see if that resolves the issue.

You can also try allowing Remote Desktop through the command line:

 netsh advfirewall firewall set rule group="remote desktop" new enable=Yes

3. Use the Correct IP Address and Port

This one trips people up more than you'd think.

When connecting:

• Open Remote Desktop Connection ( mstsc )
• Enter the correct IP address of the remote machine
• If connecting over the internet or through a custom setup, make sure you're using the right port number (default is 3389)

Common mistakes:

• Using the wrong IP address (like the public IP when you meant to use local)
• Forgetting port forwarding on your router if connecting from outside the local network
• Confusing IPv4 and IPv6 addresses

If you're unsure what IP to use:

• On the remote machine, run ipconfig in Command Prompt and look for IPv4 Address

4. Troubleshoot Advanced Issues

Sometimes the problem is deeper than basic settings.

Check these if everything else seems okay:

• Remote Desktop service is running :
  Press Win R , type services.msc , find Remote Desktop Services , and make sure it's running.

• Group Policy restrictions :
  If you're on a managed network or domain, IT policies might block Remote Desktop. This is common in work environments.

• Corrupted RDP files or profiles :
  Try deleting saved .rdp files or creating a new one from scratch.

• Update Windows :
  Occasionally, an outdated system can cause compatibility issues with RDP. Run Windows Update just in case.

If you've gone through these steps and still can't connect, double-check each setting — sometimes a small misstep like a typo in the IP address or a forgotten firewall rule is all it takes.

基本上就這些。

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