A Proxy Error 429 — the server telling your browser “too many requests” — is one of those transient but productivity-killing problems that can come from either your side (misbehaving scripts, bad proxy configuration, malware) or the server’s side (rate limiting, DDoS protection, load shedding). This guide explains what an HTTP 429 through a proxy on Windows 11 actually means, why it happens, and provides a practical, prioritized troubleshooting path that takes you from fast consumer-level...