NS_E_PROXY_CONNECT_TIMEOUT (0XC00D2F07) Fix

You're watching a video or streaming music in Windows Media Player on Windows 10 or 11. Everything's fine, then suddenly it stops. You get a message that says "It was not possible to establish a connection to the proxy server in a timely manner" with the code 0XC00D2F07. This usually happens when you're behind a corporate proxy or using a VPN that's acting up. Sometimes it's just a bad internet connection, but most times it's a wrong proxy setting inside Windows.

What causes this error?

Windows Media Player has its own proxy settings. They're separate from your web browser's proxy. If these settings are wrong — like pointing to a proxy server that's down, or set to "auto-detect" when there's no auto-detection — the player times out after about 30 seconds. The real fix is telling the player to skip the proxy entirely for local connections and use your direct internet.

Step-by-step fix

Step 1: Open Internet Options

Press the Windows key on your keyboard. Type Internet Options and click the result. This opens the old-school control panel for your browser's proxy settings. Don't worry, these settings also apply to Windows Media Player.

What you'll see: A window with tabs like General, Security, Privacy, and Connections.

Step 2: Go to LAN settings

Click the Connections tab at the top. Then click the LAN settings button near the bottom. This is the button that says "Local Area Network (LAN) settings".

What you'll see: A smaller window called Local Area Network (LAN) Settings.

Step 3: Turn off automatic proxy detection

Look for a checkbox that says "Automatically detect settings". Uncheck it. Most people think this is a safe setting, but it's not. It makes Windows scan the network for a proxy server. If it doesn't find one quickly, the player waits and waits — then times out. You don't need this unless you're on a corporate network that uses WPAD (Web Proxy Auto-Discovery). If you're at home, uncheck it.

Step 4: Disable the proxy server setting

Below the automatic detection checkbox, there's another section: "Proxy server". Find the checkbox that says "Use a proxy server for your LAN". Uncheck it. If you're on a home network, you don't need a proxy. If you're at work and you need a proxy, you'll know because IT gave you the address. Otherwise, leave it off.

What you'll see: The address and port fields turn gray when unchecked.

Step 5: Apply and restart

Click OK on the LAN Settings window. Then click OK on the Internet Options window. Now close Windows Media Player completely. Open it again and try streaming the same content.

If it still fails

Sometimes the problem isn't the proxy setting. Check these three things:

Your internet connection: Open a web browser. Can you load a website like google.com? If not, your internet is down. Fix that first.
VPN or firewall: If you're using a VPN, try turning it off temporarily. Some VPNs mess with proxy settings. Also check if Windows Defender Firewall is blocking Windows Media Player. You can temporarily disable the firewall to test — but turn it back on after.
Corrupted player cache: Press Windows + R, type %appdata%\Microsoft\Media Player and press Enter. Delete everything in that folder. Don't worry, it's safe. Windows Media Player will recreate these files when you open it again.

If none of that works, you might have a deeper issue like a malformed proxy setting in the Windows registry. That's rare for home users, but it happens. You can reset all proxy settings with this command in an admin Command Prompt:

netsh winhttp reset proxy

This tells Windows to forget all proxy settings for HTTP connections. After running it, restart your computer.

That should kill the 0XC00D2F07 error for good. It's almost always the proxy auto-detect setting that causes the timeout. Turn it off, and you're good.