Fix NS_E_WMPIM_USERCANCELED (0XC00D1127) in WMP

Windows Media Player can't connect because the internet attempt was canceled — usually a proxy or firewall block. Quick fix: reset IE proxy settings.

Quick answer: This error means WMP tried to connect to the internet but something blocked or canceled that request — almost always leftover proxy settings from a VPN, proxy tool, or security suite. Reset Internet Explorer’s proxy settings and you’re done.

Windows Media Player relies on Internet Explorer’s network stack for internet access — even if you never use IE. So when a VPN, proxy service, or security software changes those proxy settings, WMP gets stuck. It sees the proxy and tries to use it, but the connection fails or gets canceled by the software. You see 0xC00D1127. I’ve seen this on Windows 7 through 11. VPN clients like NordVPN, ExpressVPN, and older corporate VPNs are common triggers. Also McAfee and Norton — they sometimes inject proxy rules.

Fix Steps

Reset Internet Explorer proxy settings. Open IE (or Edge in IE mode) — go to Settings > Internet Options > Connections > LAN settings. Uncheck “Use a proxy server for your LAN” and make sure “Automatically detect settings” is checked. Click OK.
Flush DNS and Winsock. Open Command Prompt as admin. Run these in order:
```
ipconfig /flushdns
netsh winsock reset
netsh int ip reset
```
Restart your PC.
Check Windows Firewall. Make sure WMP isn’t blocked. Open Windows Security > Firewall & network protection > Allow an app through firewall. Find Windows Media Player — enable both Private and Public. If it’s not listed, add it manually via Allow another app.
Clear WMP database. WMP caches network info. Close WMP. Press Win + R, type %userprofile%\Local Settings\Application Data\Microsoft\Media Player (or %LOCALAPPDATA%\Microsoft\Media Player on Win10/11). Delete everything inside except Player folders. Yes, you’ll lose playlists — but it fixes corruption. Reopen WMP.
Disable proxy automatically detection in registry (last resort). If the above fails, the problem is deeper. Open regedit, go to HKEY_CURRENT_USER\Software\Microsoft\Windows\CurrentVersion\Internet Settings. Set ProxyEnable to 0. Also check HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services\Tcpip\Parameters for any proxy-related keys — if you see DhcpNameServer pointing to a proxy IP, that’s the culprit. Contact your network admin.

Alternative Fixes (if main steps don't work)

Disable VPN or proxy software completely

Uninstall or turn off any VPN client, proxy tool (like Proxifier), or security suite that may have changed your network settings. Reboot and test WMP. If it works, reinstall the software cleanly — old versions leave proxy junk behind.

Use Microsoft's Fix It tool

Microsoft’s Fix problems with Internet Explorer tool (still available in Windows 10/11) resets proxy and Winsock. Search for it in Control Panel > Troubleshooting > Internet Explorer. It’s old but works for this.

Check Group Policy (domain-joined machines)

If you’re on a corporate network, a Group Policy may enforce proxy settings. Run gpresult /h gp.html and look for “Proxy Settings” under Internet Explorer Maintenance. If it’s there, you need your IT team to change it — don’t fight Group Policy.

Prevention Tip

Before installing any VPN or proxy software, create a system restore point. That gives you a quick rollback. And if you ever see this error again after using a VPN, go straight to IE proxy settings — that’s the first thing to check. I always tell my users: never let a VPN mess with your proxy settings without asking. Most modern VPNs have a “kill switch” that can leave these artifacts behind. Make sure yours doesn’t.