HRESULT 0x80072F7F (WININET_E_TCPIP_NOT

Status / error code:

Category:

Constant name:

Source:

Facility:

Operating System:

Description:

The TCP/IP protocol is not installed or configured correctly.

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WININET_E_UNABLE_TO_CACHE_FILE	WININET_E_NOT_REDIRECTED

WININET_E_TCPIP_NOT_INSTALLED

WININET_E_TCPIP_NOT_INSTALLED is a WinINet HRESULT. It means that WinINet cannot use the TCP/IP networking stack required for the operation. The stack may be disabled, damaged, unavailable in the active network namespace, or incorrectly configured by policy or an endpoint-security product.

What to check

Confirm that the TCP/IP stack is enabled and that the machine has a usable network interface, route and DNS configuration.
Test name resolution and a direct connection to the target outside the application.
Investigate network-policy, VPN, firewall and endpoint-security changes that may have altered the stack configuration.

Microsoft documentation

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