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Windows Update Delivery Optimization Errors — Slow Downloads and P2P Issues

Warningupdate

Overview

Fix Windows Update delivery optimization errors including slow update downloads, peer-to-peer transfer failures, and bandwidth saturation issues.

Key Details

  • Delivery Optimization allows Windows to download updates from other PCs on the local network or internet
  • P2P download can consume significant bandwidth if not properly configured
  • Settings: download from Microsoft only, local network PCs, or local network + internet PCs
  • Activity Monitor shows current download/upload activity and sources
  • Corporate environments can set up a Delivery Optimization cache server (Connected Cache)

Common Causes

  • Delivery Optimization downloading from slow peers instead of Microsoft CDN
  • Background upload consuming upstream bandwidth and affecting internet speed
  • Firewall blocking Delivery Optimization P2P traffic (port 7680 TCP/UDP)
  • Corrupted Delivery Optimization cache causing download retries

Steps

  1. 1Configure bandwidth limits: Settings > Windows Update > Advanced options > Delivery Optimization > Advanced options
  2. 2Set download source: Delivery Optimization > Allow downloads from other PCs (off for simplest setup)
  3. 3Clear DO cache: run 'Delete-DeliveryOptimizationCache -Force' in PowerShell (Administrator)
  4. 4Limit upload bandwidth to prevent internet slowdowns (set to 5-10% of upload speed)
  5. 5Check Activity Monitor in Delivery Optimization settings to see download/upload amounts
  6. 6For corporate: configure WSUS or Connected Cache to centralize update distribution

Tags

windows-updatedelivery-optimizationp2pbandwidthdownload

Related Items

windows-update-0x8024001ewindows-update-0x80072efd

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Frequently Asked Questions

By default on Windows 10/11, yes — it may share update data with other PCs on the internet. Disable this in Settings > Delivery Optimization > Allow downloads from other PCs.