One of the most annoying Windows issues: WiFi disconnects every time your laptop goes to sleep or you close the lid. You wake it up and there's no internet until you restart or fiddle with settings. Here's the permanent fix.
Fix 1: Disable WiFi Adapter Power Management (Best Fix)
This fixes the problem for 80% of users:
- Right-click Start → Device Manager
- Expand Network adapters
- Right-click your WiFi adapter (e.g., Intel AX211, Realtek 8852)
- Click Properties → Power Management tab
- Uncheck "Allow the computer to turn off this device to save power"
- Click OK
- Test by putting laptop to sleep and waking
Fix 2: Change WiFi Adapter Advanced Settings
- In Device Manager → WiFi adapter → Properties → Advanced tab
- Find "Wireless Mode" or "Roaming Aggressiveness" → set to Medium
- Find "Power Saving Mode" → set to Off or Maximum Performance
- If you see "Wake on Magic Packet" → set to Enabled
Fix 3: Change Power Plan Settings
- Open Control Panel → Power Options
- Click Change plan settings for your active plan
- Click Change advanced power settings
- Expand Wireless Adapter Settings → Power Saving Mode
- Set both On Battery and Plugged In to "Maximum Performance"
- Click OK
Fix 4: Disable Fast Startup
Fast Startup can cause hardware resume issues:
- Open Control Panel → Power Options
- Click "Choose what the power buttons do"
- Click "Change settings that are currently unavailable"
- Uncheck "Turn on fast startup"
- Click Save changes
Fix 5: Update WiFi Driver
- Check your WiFi adapter name in Device Manager → Network adapters
- Go to the manufacturer's website:
- Intel WiFi: intel.com/content/www/us/en/support/detect.html
- Realtek: Your laptop manufacturer's support page
- Qualcomm/Atheros: Your laptop manufacturer's support page
- Download and install the latest driver
- Restart computer
Fix 6: Reset TCP/IP After Sleep
If WiFi connects but shows "No internet" after sleep, run these in Command Prompt (Admin):
netsh winsock reset
netsh int ip reset
ipconfig /release
ipconfig /renew
ipconfig /flushdns
Restart after running all commands.
Fix 7: Create a Wake Script (Advanced)
Create a scheduled task that resets WiFi on wake:
- Open Task Scheduler
- Create a new task triggered by "On workstation unlock"
- Action: Run netsh interface set interface "Wi-Fi" disable then netsh interface set interface "Wi-Fi" enable
- This forces a clean WiFi restart on every wake
Frequently Asked Questions
Why does WiFi disconnect after sleep mode?
Windows uses power management to turn off WiFi during sleep to save battery. When waking up, the adapter should re-enable, but often fails due to: (1) Power management settings keeping the adapter off, (2) Driver bugs that don't properly resume, (3) DHCP lease expiration during long sleep, (4) Fast Startup conflicts, (5) Outdated WiFi drivers.
Why does my laptop say 'No Internet' after waking from sleep?
The WiFi adapter reconnected to the router but didn't get a proper IP address. The DHCP lease may have expired during sleep or the adapter didn't request a new one. Fix: open Command Prompt → run 'ipconfig /release' then 'ipconfig /renew'. Or simply toggle WiFi off/on.
Should I disable sleep mode entirely to fix this?
No — that wastes battery and energy. Instead, fix the power management settings for the WiFi adapter: Device Manager → WiFi adapter → Properties → Power Management → uncheck 'Allow the computer to turn off this device.' This keeps WiFi powered during sleep.
WiFi works after sleep but drops after a few minutes — why?
This is usually a driver issue. The adapter resumes but doesn't maintain a stable connection. Update the WiFi driver from the manufacturer's website (not Windows Update). Also check: roaming aggressiveness (set to Medium), preferred band (if dual-band router, try setting to 5 GHz only).
Does this issue happen with Ethernet too?
Less commonly, but yes. The same power management setting applies to Ethernet adapters. If Ethernet drops after sleep: Device Manager → Ethernet adapter → Properties → Power Management → uncheck 'Allow the computer to turn off this device.'
WiFi Still Dropping After Sleep?
Our technicians can remotely configure power management and drivers.