Windows System Errors
Update Endpoint Forbidden
0x80244018Reviewed for reference consistency: August 11, 2026
the update server answered the scan with HTTP status 403
What 0x80244018 Means
The 0x80244018 error on the Windows System Errors indicates update endpoint forbidden — the update server answered the scan with http status 403. This typically occurs due to a proxy or filtering appliance returns 403 for the update urls the agent requested.
Inside the Windows Update protocol talker, an HTTP 403 from the update source is re-raised as 0x80244018, WU_E_PT_HTTP_STATUS_FORBIDDEN. Microsoft's error reference defines it — 'Same as HTTP status 403 - server understood the request but declined to fulfill it' — and the upgrade documentation pairs the code with one scenario above all: the machine is connected through a proxy server.
How to fix 0x80244018
General informational guidance, not professional advice. Commands can affect your system or data — back up first and proceed at your own risk. FixerCode is an independent reference, not affiliated with any vendor mentioned.
Show the effective proxy configuration
Machine-level proxy settings determine which device answers update requests, and the display form makes no changes.
netsh winhttp show proxyShow the per-user proxy configuration
WinINet honors the per-user Internet Settings values; they name the proxy that answered 403 on behalf of the destination.
Get-ItemProperty "HKCU:\Software\Microsoft\Windows\CurrentVersion\Internet Settings" | Select-Object ProxyEnable, ProxyServer
Technical Background
The code is a faithful pass-through: the protocol talker reached an HTTP endpoint, and that endpoint returned the 403 status. Nothing about the transport failed — the server heard the request and answered no. The upgrade documentation reads the code exactly that way, attributing it to a proxy connection and directing attention to the client's automatic detection settings.
Placement within the WU_E_PT_HTTP_STATUS family gives the code its precision. The reference lists the family sequentially — 0x80244016 for 400, 0x80244017 for 401, 0x80244018 for 403, 0x80244019 for 404 — so the family translates HTTP status semantics into update result codes one for one. A 403 in this pipeline is an authorization verdict from something in the path: the destination, a proxy, or an intermediate appliance enforcing policy.
Common Causes
- A proxy or filtering appliance returns 403 for the update URLs the agent requested
- A WSUS server's web configuration denies the client's request
- The update endpoint itself declined the request based on its access policy
Typical Scenarios
- A client behind a proxy or inspecting appliance receives 403 for update endpoints, surfacing as a download error in update history
- A WSUS server's web configuration denies the client's request, which the agent reports with this code
- Network filtering policy allows the scan but forbids the payload download, producing the refusal at the download stage
What to Know
The refusal came from a decision-maker in the path, so the investigation belongs to proxy and filtering configuration rather than to the client's update store or servicing stack.
Frequently Asked Questions
Common questions about Windows 0x80244018 error
The update agent's version of HTTP 403. Microsoft's error reference defines 0x80244018 as 'Same as HTTP status 403 - server understood the request but declined to fulfill it'.
The upgrade resolution table attributes 0x80244018 to machines connected through a proxy and points at the client's automatic detection settings, because the proxy path is where 403 verdicts most often originate.
0x80244017 maps to HTTP 401 (authentication required); 0x80244018 maps to 403 (understood but refused). The first asks for credentials, the second declines regardless of them.
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