Wifi slow only on one device

Symptoms

• Internet is slow on one device only
• Other devices on the same network work normally
• Speed improves temporarily when reconnecting to Wi-Fi
• Issue persists across restarts

Why This Happens

When Wi-Fi issues affect only one device, the problem is almost always local. Driver behavior, power-saving features, or software conflicts can reduce throughput without disconnecting entirely. Common causes include: - Outdated or corrupted Wi-Fi drivers - Power-saving throttling the wireless adapter - VPN or security software interference - Wireless band compatibility issues

Step-by-Step Troubleshooting

Step 1: Restart the Device and Wi-Fi Adapter

• Restart the affected device.
• Toggle Wi-Fi off and back on.

Step 2: Forget and Reconnect to the Network

• Remove the Wi-Fi network from saved networks.
• Reconnect using the correct password.

Step 3: Disable Wi-Fi Power Saving

• Open Device Manager.
• Disable power-saving options for the Wi-Fi adapter.

Step 4: Update Wi-Fi Drivers

• Install drivers directly from the manufacturer.
• Avoid generic Windows Update drivers.

Step 5: Disable VPNs and Security Software Temporarily

• Test speeds without VPNs or filters enabled.

When This Topic Is Limited

If speeds remain slow after driver and power fixes, hardware limitations may be the cause.

Summary

Wi-Fi slowdowns on a single device are almost always caused by local configuration or driver issues. Correcting these restores normal speeds.