Fix WiFi Connection Problems
Follow these troubleshooting steps to diagnose and fix common WiFi connectivity issues on any device.
This guide provides a decision-tree flowchart for diagnosing WiFi problems, covering random disconnections, connected-but-no-internet states, authentication failures, and single-device slowness with specific fixes for each scenario.
WiFi adapter power management causes 40% of random disconnection issues on laptops — disabling 'Allow the computer to turn off this device to save power' in Device Manager resolves most intermittent drops.
Restart network equipment
Power off modem and router for 30 seconds, then turn on modem first, wait 1 minute, then router
Forget and reconnect
Remove the WiFi network from saved networks and re-enter the password
Update network drivers
Check for WiFi adapter driver updates in Device Manager or System Preferences
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Common Issues and How to Fix Them
WiFi keeps disconnecting every few minutes
Disable WiFi adapter power saving in Device Manager > Network Adapters > Properties > Power Management. Also update the WiFi driver from the manufacturer's site (not Windows Update) and check for channel congestion.
WiFi shows 'Connected' but no internet access
The router has internet issues. Restart modem and router in sequence (modem first, wait 2 minutes, then router). Flush DNS with 'ipconfig /flushdns' and try setting DNS to 8.8.8.8 manually.
Authentication error when entering correct WiFi password
Forget the network in WiFi settings, restart the WiFi adapter, and reconnect with the password. Check if MAC filtering is enabled on the router. Verify the password is case-sensitive and has no trailing spaces.
WiFi is slow on one specific device while others work fine
Update the WiFi driver, check if the device supports the router's WiFi standard (WiFi 5 AC vs WiFi 6 AX), clear the DNS cache, disable VPN, and check for background downloads or updates consuming bandwidth.