Blocked by Windows Parental Controls
Production Risk
Low — client-side restriction, not a server-side issue.
450 Blocked by Windows Parental Controls is a Microsoft extension returned by Windows when the Parental Controls feature is configured to block access to a website. It is not generated by web servers but by the Windows operating system's network stack.
- 1Windows Parental Controls are enabled and configured to block the requested website.
- 2The URL or category of content is on the parental controls blocklist.
- 3A user on a restricted Windows account is attempting to access a blocked site.
A child's Windows account tries to access a website blocked by the parent's content filter settings.
GET / HTTP/1.1 Host: blocked-site.example.com
expected output
HTTP/1.1 450 Blocked by Windows Parental Controls
Fix
Adjust Windows Parental Controls settings
WHEN The block is unintended.
# Windows Settings → Accounts → Family & other users # Adjust content restrictions for the relevant account
Why this works
Allows the administrator to whitelist specific sites or adjust content filter settings.
Generated by the Windows OS, not by web servers. Not part of any IETF standard.
Microsoft Windows documentation
https://en.wikipedia.org/wiki/List_of_HTTP_status_codes#450 ↗Content generated with AI assistance and reviewed for accuracy. Found an error? hello@errcodes.dev