Windows 11 defaults Delivery Optimization to “PCs on my local network and PCs on the internet.” Your machine can upload cumulative update files to strangers to help Microsoft’s CDN, and no user-facing toast tells you it is happening. On a metered plan or a slow rural line, the same setting is the reason downloads for other apps grind to a stop right after Patch Tuesday.
The seven best apps for controlling Windows Update bandwidth below either cap the upload side of Delivery Optimization, throttle Windows Update as a whole, or block it selectively when you need the network for something else. All work on Windows 10 and Windows 11.
What to look for in a Windows Update bandwidth tool
- Per-process rate limiting, so you can throttle
svchost.exeandMoUsoCoreWorker.exewithout touching the browser. - Delivery Optimization control, either through the Windows setting or by blocking the peer-to-peer path.
- Scheduling, so throttling turns on during work hours and off overnight.
- A live traffic view, so you can confirm the rules are working when a download slows.
- Metered connection detection, so the tool tightens automatically on a hotspot.
- A kill switch, so an emergency block does not need a reboot.
Quick comparison table
| App | Best for | Platforms | Free plan | Starting price/mo | Rating |
|---|---|---|---|---|---|
| GlassWire | Firewall plus per-app traffic view | Windows | Free (limited) | $2.99 | Well reviewed |
| NetLimiter | Per-process bandwidth caps | Windows | 30-day trial | $19.95 one-time | Highly rated |
| TripMode | Metered-connection auto-block | Windows, macOS | 7-day trial | $2.50 | Loved on tethered plans |
| Wumgr | Full Windows Update disable/enable | Windows | Free (OSS) | Free | Niche but effective |
| Windows Update Blocker | One-click WU service block | Windows | Free | Free | Widely used |
| NetBalancer | Per-process priority queues | Windows | Free (5 processes) | $49.95 one-time | Power-user pick |
| TrafficMonitor | Live traffic and system-tray meter | Windows | Free (OSS) | Free | Popular in enthusiast forums |
The apps
1. GlassWire – best for firewall plus per-app traffic view
GlassWire shows every process using the network in real time, with a graph you can scrub back through to see when Windows Update fired. The included firewall lets you block outbound traffic per app with one click, and a “Things” tab warns when a new host or DNS lookup shows up.
Where it falls short: The free tier caps history to a few days and limits some alerts. Bandwidth throttling is coarse — block or allow, not “cap at 500 KB/s.”
Pricing:
- Free: current sessions, basic firewall, host detection.
- Paid: Basic at $2.99/month, Pro at $6.99/month with longer history and remote monitoring.
Platforms: Windows.
Download: GlassWire.com
Bottom line: GlassWire is the fastest way to see what caused the last bandwidth spike, then block it.
2. NetLimiter – best for per-process bandwidth caps
NetLimiter is the tool most system integrators reach for when a Windows box needs a hard bandwidth cap on svchost or Steam. Rules apply per process, per user, and per connection, and you can chain a scheduler so caps are 100 KB/s during work hours and unlimited at night.
Where it falls short: UI is dense and takes an afternoon to learn. Licensing is per machine, so a household of PCs adds up.
Pricing:
- Free: 30-day trial with full functionality.
- Paid: Personal at $19.95 one-time, Pro at $29.95 one-time per machine.
Platforms: Windows.
Download: NetLimiter.com
Bottom line: Pick NetLimiter when you need a hard cap on Windows Update rather than a full block.
3. TripMode – best for tethered and metered lines
TripMode blocks background traffic the moment you tether to a phone or connect to a hotspot SSID it recognises. Windows Update, Delivery Optimization, and OneDrive all go silent until you tap Allow on the tray icon.
Where it falls short: SSID-based triggers work best if your phone hotspot uses a stable name. Not aimed at users who want per-KB caps on a fixed line.
Pricing:
- Free: 7-day trial.
- Paid: subscription at $2.50/month or one-time perpetual licenses starting around $29.
Platforms: Windows, macOS.
Download: TripMode.ch
Bottom line: TripMode is the “airplane mode for Windows Update” for anyone who works from a hotspot.
4. Wumgr – best for a full Windows Update kill switch
Wumgr (Windows Update Manager) exposes the underlying Windows Update APIs directly. You can pause updates for weeks at a time, choose which updates to install, block specific KB numbers, and stop the update service entirely.
Where it falls short: Open-source, community-maintained. No commercial support, and each Windows feature update needs a quick check that Wumgr still hooks the right services.
Pricing:
- Free: MIT-licensed.
Platforms: Windows.
Download: DavidXanatos GitHub
Bottom line: Wumgr is the friendliest way to freeze Windows Update without editing Group Policy.
5. Windows Update Blocker – best for a one-click block
Windows Update Blocker is a tiny portable tool from Sordum that flips the Windows Update service state between disabled, manual, and automatic. No install, no telemetry, no persistent process. If you just want to stop background updates during a live gig or a critical build, click once and it is done.
Where it falls short: No per-app control, no throttling. It is a service switch, nothing more.
Pricing:
- Free.
Platforms: Windows.
Download: Sordum.org
Bottom line: Windows Update Blocker is the emergency stop button you keep in the tray.
6. NetBalancer – best for priority queues
NetBalancer works less like a limiter and more like a router QoS layer on the local machine. Give Zoom “high” priority, Windows Update “low”, and background sync “block during work hours,” and NetBalancer arbitrates on every packet. Traffic charts are the most detailed on this list.
Where it falls short: Free tier limits you to five priority rules. Setup takes longer than GlassWire.
Pricing:
- Free: up to five process rules.
- Paid: Personal at $49.95 one-time, Pro at $99.95 one-time.
Platforms: Windows.
Download: Seriousbit.com
Bottom line: Pick NetBalancer if latency-sensitive apps and heavy background updates share the same link.
7. TrafficMonitor – best for a live traffic tray meter
TrafficMonitor is an open-source tray meter that shows current upload and download rates and a per-process breakdown on click. It cannot throttle by itself, but it pairs perfectly with Windows Group Policy or Wumgr for enforcement and gives you the visibility Windows lacks.
Where it falls short: No blocking, no throttling. Reading tool only.
Pricing:
- Free: MIT-licensed.
Platforms: Windows.
Download: Zhongyang219 GitHub
Bottom line: Install TrafficMonitor even if you use another blocker, so you can prove which app spiked the line.
How to pick the right one
- If you want to see and stop what is uploading right now: GlassWire.
- If you want a hard bandwidth cap on Windows Update: NetLimiter.
- If you work off a phone hotspot: TripMode.
- If you want updates fully paused for weeks: Wumgr.
- If you want a quick block for a live event: Windows Update Blocker.
- If several latency-sensitive apps compete with updates: NetBalancer.
- If you just want to know what is happening on the network: TrafficMonitor.
Do not use two blockers at once. They fight over the Windows Update service and leave the machine in an in-between state where nothing installs and nothing blocks.
FAQ
How do I turn off Windows Delivery Optimization uploads?
Open Settings, Windows Update, Advanced options, Delivery Optimization. Turn off “Allow downloads from other PCs” for the fastest fix, or set it to “PCs on my local network only” to keep peering inside your house. Group Policy Editor has the same setting under Computer Configuration, Administrative Templates, Windows Components, Delivery Optimization.
Does Windows 11 upload update files to random computers on the internet?
By default yes, if Delivery Optimization is left on the “Devices on my local network, and devices on the Internet” option. On Home editions the setting exists under Advanced Options but is easy to miss. Pro and Enterprise editions can also enforce it through Group Policy.
What is the best free tool to block Windows Update?
Wumgr and Windows Update Blocker are both free and safe. Wumgr keeps more control after the block. Windows Update Blocker is one click, portable, and does not run in the background.
Can I schedule Windows Update to only run at night?
Yes, through Windows Update active hours in Settings (limited window) or through Group Policy on Pro/Enterprise for a stricter schedule. NetLimiter and NetBalancer both let you attach time-based throttling to svchost.exe for finer control on Home editions.
Will blocking Windows Update leave my PC insecure?
Only if you leave it blocked for months. The safe pattern is: block during travel, tethered use, or big work weeks, then release the block over a weekend so cumulative updates install with the network you want them on.
