Fix Slow Wi-Fi on Windows 11

Quick Diagnosis First

Before changing anything, confirm the problem is device-specific:

1. Run a speed test on your Windows 11 PC and note the result.
2. Run the same test on your phone or another laptop on the same Wi-Fi network.
3. If other devices are significantly faster, the issue is definitely your Windows 11 device — continue below.
4. If all devices are slow, the problem is your router or ISP — not Windows.

Fix 1: Disable Wi-Fi Adapter Power Management

Windows power management often throttles your Wi-Fi adapter to save battery, even on plugged-in laptops. This is one of the most common causes of slow Wi-Fi on Windows 11.

1. Right-click the Start button and select Device Manager
2. Expand Network Adapters and find your Wi-Fi adapter (usually named Intel Wi-Fi, Realtek, or Qualcomm)
3. Right-click the adapter and select Properties
4. Click the Power Management tab
5. Uncheck "Allow the computer to turn off this device to save power"
6. Click OK and test again

Also check your power plan: go to Settings → System → Power & battery → Power mode and set it to Best performance. The Balanced setting restricts the adapter's transmission power.

Fix 2: Update Your Wi-Fi Adapter Driver

Outdated drivers are a frequent cause of poor Wi-Fi performance on Windows 11, especially after major Windows updates that can replace manufacturer drivers with generic Microsoft ones.

1. Visit your laptop or PC manufacturer's support website (Dell, HP, Lenovo, Asus, etc.)
2. Enter your model number and navigate to Drivers & Downloads
3. Download the latest Wi-Fi or network driver for Windows 11
4. Install and restart

Manufacturer-provided drivers are more current and better optimized than what Windows Update installs. Do not rely solely on Device Manager's "Search automatically" — it often finds older versions.

Fix 3: Adjust Wi-Fi Adapter Advanced Settings

Some adapter settings can significantly limit throughput. Access them via Device Manager → your adapter → Properties → Advanced tab:

Fix 4: Reset the Windows Network Stack

Corrupted Winsock or TCP/IP stacks can cause persistent slow connections. Open Command Prompt as Administrator (search "cmd", right-click, Run as administrator) and run these commands in order:

netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /flushdns
ipconfig /renew

Restart your computer after running all commands. This resets Windows networking to default state and often resolves persistent speed issues that survive driver updates.

Fix 5: Check for Background Bandwidth Consumers

Windows 11 has several background processes that can consume significant bandwidth:

• Windows Update: Open Settings → Windows Update — if updates are downloading, they can saturate your connection. Pause updates temporarily for testing.
• Delivery Optimization: Windows shares update files to other PCs on your network and over the internet. Go to Settings → Windows Update → Advanced Options → Delivery Optimization and turn off "Allow downloads from other PCs".
• OneDrive sync: A large OneDrive sync will consume upload bandwidth and can slow down all network activity. Check OneDrive status in the taskbar.
• Antivirus / security software: Some security tools perform cloud-based scanning that adds latency and bandwidth overhead.

Open Task Manager → Performance → Open Resource Monitor → Network tab to see which processes are currently using bandwidth.

Fix 6: Change DNS Server

Slow DNS resolution makes web pages feel slow even on a fast connection. Change to a faster public DNS server:

1. Go to Settings → Network & Internet → Wi-Fi → your network name → Edit (DNS server assignment)
2. Change to Manual and set IPv4 Preferred DNS to 1.1.1.1 (Cloudflare) or 8.8.8.8 (Google)
3. Set Alternate DNS to 1.0.0.1 or 8.8.4.4

Fix 7: Forget and Reconnect to the Wi-Fi Network

Sometimes Windows stores a corrupted network profile that causes persistent issues. Go to Settings → Network & Internet → Wi-Fi → Manage known networks → find your network → Forget. Then reconnect by entering your password again. This forces a fresh connection negotiation.

Frequently Asked Questions

Why is my Wi-Fi slow on Windows 11 but fast on other devices?

The problem is device-specific — your router and ISP are working correctly. Common causes: outdated driver, power management throttling, incorrect adapter settings, or background Windows processes consuming bandwidth.

How do I update my Wi-Fi driver on Windows 11?

Visit your laptop manufacturer's support site and download the latest Wi-Fi driver for your model. Don't rely solely on Windows Update — manufacturer downloads are more current.

Does Windows 11 power saving mode slow down Wi-Fi?

Yes. Disable it in Device Manager → your adapter → Properties → Power Management tab, and set your power plan to Best Performance in Settings.

What is the Windows 11 network reset command?

Run in Command Prompt as administrator: netsh winsock reset, then netsh int ip reset, then ipconfig /flushdns. Restart after all commands complete.