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WININET_E_NAME_NOT_RESOLVED
WININET_E_NAME_NOT_RESOLVED means that WinINet could not resolve the server name. It indicates a name-resolution failure before a connection to the target server could be established.
Checks that distinguish the cause
- Verify the host after URL parsing, including IDN conversion and trailing-dot handling.
- Check the active DNS resolver, split-DNS or VPN policy, and whether a proxy is expected to resolve the destination instead of the local system.
- Compare the result for the same name from the affected user context, because WinINet settings and proxy configuration can be per-user.
Retry policy
A short retry can help with a transient resolver problem, but retrying an invalid hostname or a consistently blocked DNS path only delays the failure. Preserve the original resolution error in diagnostic logs.
Microsoft: WinINet error messages · Microsoft: InternetConnect
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