How to Fix Slow WiFi After Sleep in Windows 11

If your WiFi becomes slow or unstable after waking your PC from sleep, you’re not alone. This is a common issue in Windows 11 where the network adapter doesn’t resume properly, leading to reduced speeds or connectivity problems.

The issue is usually caused by power management settings, outdated drivers, network glitches, or adapter configuration issues. In this guide, we’ll walk you through how to fix slow WiFi after sleep in Windows 11.

How to Fix Slow WiFi After Sleep in Windows 11

Follow the methods below to restore normal internet speed.

1. Restart WiFi Adapter

A quick reset often fixes the issue.

1. Press Windows + I → go to Network & internet.
2. Click Advanced network settings.
3. Under Network adapters, disable your WiFi adapter.
4. Wait a few seconds, then enable it again.

2. Disable Power Saving for WiFi Adapter

Windows may limit power after sleep.

1. Right-click Start → Device Manager.
2. Expand Network adapters.
3. Right-click your WiFi adapter → Properties.
4. Go to Power Management tab.
5. Uncheck:
   • Allow the computer to turn off this device to save power
6. Click OK.

3. Update WiFi Drivers

Outdated drivers can cause slow performance.

1. Open Device Manager.
2. Expand Network adapters.
3. Right-click your WiFi adapter.
4. Click Update driver → Search automatically.

For best results, download drivers from your laptop or adapter manufacturer.

4. Disable Fast Startup

Fast Startup can interfere with network recovery.

1. Open Control Panel → Power Options.
2. Click Choose what the power buttons do.
3. Click Change settings that are currently unavailable.
4. Uncheck:
   • Turn on fast startup
5. Save changes.

5. Reset Network Settings

This clears network-related issues.

1. Press Windows + I.
2. Go to Network & internet → Advanced network settings.
3. Click Network reset.
4. Confirm and restart your PC.

6. Change WiFi Power Plan Settings

1. Open Control Panel → Power Options.
2. Click Change plan settings → Change advanced power settings.
3. Expand:
   • Wireless Adapter Settings → Power Saving Mode
4. Set to:
   • Maximum Performance

7. Flush DNS and Reset TCP/IP

1. Open Command Prompt (Admin).
2. Run: ipconfig /flushdns
   netsh int ip reset
   netsh winsock reset
3. Restart your PC.

8. Disable Metered Connection (If Enabled)

1. Go to Settings → Network & internet → WiFi.
2. Click your network.
3. Turn off:
   • Metered connection

9. Check Router and Signal Strength

Sometimes the issue is external.

• Restart your router
• Move closer to the router
• Switch WiFi bands (2.4GHz / 5GHz)

10. Update Windows 11

System bugs may cause network issues.

1. Press Windows + I.
2. Go to Windows Update.
3. Click Check for updates.

Common Causes of Slow WiFi After Sleep

• Power-saving settings disabling adapter
• Outdated or buggy drivers
• Network stack issues
• Fast Startup conflicts
• Weak WiFi signal

Conclusion

Slow WiFi after sleep in Windows 11 is usually caused by power management or driver-related issues. By disabling power-saving options, updating drivers, resetting network settings, and optimizing power plans, you can restore normal internet performance.

Applying these fixes will ensure your WiFi reconnects properly after sleep and delivers consistent speeds every time you wake your PC.