I capped Windows Update's bandwidth with Delivery Optimization, and my downloads stopped choking

Delivery Optimization has shared my Windows update files with other PCs in the background for years, and I've always kept it on a short leash. If left alone, it competes with everything else I do online, from downloads to video calls to games. So I cap it on every PC I use, and my connection stops choking the moment a large update arrives.

Delivery Optimization shares your connection in both directions

Delivery Optimization is Microsoft's peer-to-peer system for handing out Windows updates and Store apps, and it runs by default on nearly every Windows 11 PC. The idea is reasonable enough. Instead of pulling updates directly from Microsoft, your PC can fetch them from nearby PCs, which eases the load on Microsoft's servers.

The catch is that the sharing goes both ways. While your PC pulls bits from other devices, it also uploads bits to them, and that upstream traffic is what tends to strangle a home connection.

On most current builds, this sharing is scoped to your local network by default, though some computers are configured to share across the internet as well. It's worth checking which one you're on. You'll find it all under Settings > Windows Update > Advanced options > Delivery Optimization.

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That page also has an Activity monitor view, which shows how much of your recent updates came from peers versus Microsoft. It makes the gap between a capped and a wide-open connection easy to see the next time a large update lands.

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A hard bandwidth cap is the fix that actually matters

The single most useful change is one click deeper, under the Delivery Optimization page, open the Download options, and Windows gives you two ways to limit how much bandwidth updates can take: an absolute cap measured in Mbps, or a percentage of your measured bandwidth. You can apply either one to background downloads, foreground downloads, or both.

I lean on the absolute cap because it behaves the same no matter what my connection is doing. On a slower line, a fixed ceiling keeps updates from swallowing everything; on a fast one, a modest percentage does the job. Either way, I set background downloads low, since those are the ones that sneak up on me, and give foreground a little more room.

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One thing to know before you celebrate is that these limits only apply to automatic update downloads. If you manually hit Download & install in Windows Update, or pull an app from the Store yourself, Windows ignores these caps. So the real win here is protecting everything else you're doing while updates arrive on their own schedule.

Frequently Asked Questions

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Question #1

How do I find Delivery Optimization settings in Windows 11 to check whether my PC is sharing updates?

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Question #2

What is the difference between capping downloads with an absolute Mbps limit versus a percentage of measured bandwidth?

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Question #3

Which Delivery Optimization setting controls whether my PC uploads update files to other devices on the internet or only my local network?

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Where can I limit the percentage of upload bandwidth used for Delivery Optimization and set a monthly upload cap?

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Your upload bandwidth is the part that really strangles the line

If capping downloads is the fix that matters most, curbing uploads is the change I underestimated. On a typical home connection, your upload speed is a fraction of your download speed, so even a little background seeding can drag calls, uploads, and game lobbies to a crawl.

The setting you want sits right at the top of the Delivery Optimization page. You can switch off "Allow downloads from other PCs" completely, which routes all your update traffic straight from Microsoft, or keep it on and pick "Devices on my local network."

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I keep the local option on because I run more than one PC at home and they help each other along. If you only have one computer, though, turning it off costs you nothing.

On the same page, the Upload settings let you cap the percentage of bandwidth used for uploading and set a monthly upload limit in gigabytes. I set both low. There's no reason my PC should spend its evenings feeding update files to the rest of the neighborhood while I'm trying to use it.

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Scheduling and metered connections are the finishing touches

A couple of smaller settings round things out, though I want to be clear about what they do. Active hours, in Settings > Windows Update > Advanced options, does not cap bandwidth at all. What it controls is when Windows is allowed to restart to finish installing updates, so setting it to your working and gaming hours keeps a surprise reboot from landing mid-task. It's a timing tool, not a throttle, but it still belongs in this list.

The setting that cuts real traffic is to mark your connection as metered under Settings > Network & internet > WiFi and then select your network. When a connection is metered, Delivery Optimization stops automatically sharing updates with other PCs over the internet, which is handy on a laptop that relies on a phone's hotspot.

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If you want to see where your update pieces are coming from, open PowerShell and run Get-DeliveryOptimizationStatus. It spells out every source, and it's the quickest way to confirm your changes took hold.

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Windows runs plenty of background chores worth reining in

Delivery Optimization is one of many things Windows does on your behalf without asking twice, and it won't be the last worth a look. Next time your connection feels off, audit which apps have background data permission, what launches at startup, and whether sync tools are running when they don't need to. A few minutes here buy back a connection that answers to you first.