Windows 11 Slow Internet? Combine Multiple Connections
Windows 11 slow internet usually has a plain cause: the PC spends your bandwidth in the background (Windows Update, OneDrive sync, Microsoft Store installs) over one connection. That is why the same PC can feel quick one hour and stalled the next, and you are not the only one seeing it.
Speedify is an app that lets a Windows 11 PC use several internet connections at the same time (Wi-Fi, wired Ethernet, a phone’s 4G/5G cellular), so background traffic is not competing for a single lane. That setup is often called link aggregation on Windows 11. The speed gain needs two or more connections: on one connection, Speedify works as an encrypted VPN and can be a little slower.
Speedify gets you faster upload and download speeds on the device you already have.
Find out the reasons Windows 11 internet runs slow, the optimisation and troubleshooting steps to work through, and how Speedify combines your connections.
How to Fix Windows 11 Slow Internet with Speedify
- Download Speedify for Windows (it runs on Windows 10 and Windows 11).
- Open Speedify and create a free account (the free tier includes 5 GB per month), or sign in.
- Give the PC a second internet connection: keep Wi-Fi on and plug in Ethernet, add a second Wi-Fi network, or share a phone over USB or Personal Hotspot. An iPhone shared over USB needs Apple’s drivers, which come with iTunes or Apple Devices.
- Click Connect. Speedify sends traffic over both connections at once and moves it to the working one when one weakens.
- Run the download, update or app that was slow and use it as usual.
Reasons for Windows 11 Slow Internet
Several factors contribute to poor internet performance on Windows 11 systems. Background application updates often consume substantial bandwidth without user awareness, particularly Windows Update processes and Microsoft Store app installations that run automatically.
Network adapter driver incompatibilities represent another frequent culprit. Windows 11’s hardware requirements and driver architecture changes can create conflicts with older network adapters, resulting in suboptimal performance even with high-speed internet connections.
DNS resolution issues also impact perceived internet speed. Windows 11 defaults to automatic DNS server selection, which may not provide optimal routing for your geographic location or internet service provider infrastructure.
Windows 11 Internet Optimization Methods
Begin troubleshooting by updating network adapter drivers through Device Manager or manufacturer websites. Outdated drivers frequently cause speed limitations and connection stability issues that a driver update often resolves.
Configure DNS servers manually using faster alternatives like Cloudflare (1.1.1.1) or Google DNS (8.8.8.8). Access these settings through Network & Internet settings, then Advanced network settings, and modify DNS server assignments for your active connection.
Disable background apps consuming bandwidth through Settings > Apps > Startup apps, and review which applications have network access permissions. Many pre-installed Windows 11 applications continuously sync data, impacting available bandwidth for primary activities.
Reset network settings using the built-in Network Reset feature under Settings > Network & Internet > Advanced network settings. This process removes and reinstalls network adapters while resetting networking components to default configurations.
Advanced Fixes for Windows 11 Network Throttling and Slow Internet
Windows 11’s power management features can throttle network adapter performance to conserve battery life. Disable power saving mode for network adapters through Device Manager > Network adapters > Properties > Power Management, unchecking “Allow the computer to turn off this device to save power.”
The QoS Packet Scheduler only prioritizes traffic when an app asks for it; it does not reserve a share of your bandwidth, so turning it off rarely changes speed. To test it anyway, open Control Panel > Network and Internet > Network Connections, right-click the adapter, choose Properties and uncheck “QoS Packet Scheduler”.
Configure Windows Update Delivery Optimization to stop updates from using too much bandwidth. Go to Settings > Windows Update > Advanced options > Delivery Optimization, open Advanced options and set limits for download and upload bandwidth.
Combine Wi-Fi, Ethernet and 4G/5G Cellular on Windows 11 with Speedify
When troubleshooting does not fix slow internet on Windows 11, the connection itself is usually the limit. Add a second internet connection, and Speedify uses both at the same time.
Speedify combines Wi-Fi, 4G/5G cellular, Ethernet, Starlink and satellite internet connections at the same time to increase overall bandwidth and keep the connection up when one drops. This helps most when a Windows 11 PC depends on one inconsistent connection.
With its technology for combining internet connections, Speedify lets you add a phone’s 4G/5G cellular to your Wi-Fi or Ethernet. When Wi-Fi becomes congested or unreliable, Speedify sends more of the traffic over cellular, so downloads keep moving and the connection does not drop.
On one connection, Speedify works like any encrypted VPN and can be a little slower. With two or more, Speedify sends data over multiple pathways simultaneously, splitting packets across the connections according to how each one is performing, so the combined bandwidth is higher than either connection alone.
Speedify
Get started with Speedify today.
Speedify combines Wi-Fi, 4G/5G cellular, Ethernet, Starlink and satellite into one faster, more reliable internet connection. Free to try: 5 GB a month with a free account. No credit card required.
🚀 Speed
Faster uploads and downloads, because Speedify uses all your internet connections at once.
📶 Stability
If one internet connection drops, Speedify moves your traffic to the others in milliseconds.
🔒 Security
AES-256 encryption on every internet connection, on any network you join.
15M+ downloads worldwide. 75K+ five-star reviews on iOS and Android.