Microsoft Xmlhttp Msxml3 Dll Error 800c0005 (2027)

Think of it like typing a web address into a browser but getting DNS_PROBE_FINISHED_NXDOMAIN or a 404 —except the XMLHTTP object gives you this hexadecimal code instead.

| Action | Expected Result | |--------|------------------| | 1. Test with http:// instead of https:// | If works → TLS mismatch. | | 2. Install KB3140245 + KB3072630 | Enables TLS 1.2 in WinHTTP. | | 3. Add DefaultSecureProtocols =0xA00 in registry | Forces TLS 1.2 for MSXML3/WinHTTP. | | 4. Switch to ServerXMLHTTP.6.0 in code | Bypasses MSXML3 entirely. | | 5. Re-register msxml3.dll | Fixes corruption. | | 6. Deploy a proxy shim | Ultimate fallback. | microsoft xmlhttp msxml3 dll error 800c0005