Your PC is probably dropping WiFi because of interference, driver problems, or router settings — not because the connection itself is broken

A PC that disconnects from WiFi every few minutes or hours is usually fixable without replacing hardware. The most common causes are outdated or corrupted network drivers, interference from other devices on the same frequency, a router that needs to be restarted, or power-saving settings that shut down your WiFi adapter to save battery. Less often, the problem is a weak signal from too much distance or too many walls between your PC and router.

The fastest way to narrow down the cause is to restart your router first — unplug it for 30 seconds, then plug it back in — and watch whether the disconnections stop. If they do, the problem was the router, not your PC. If they continue, move through the fixes below in order, testing after each one.

Key Takeaways

  • Restart your router by unplugging it for 30 seconds; this fixes roughly half of all WiFi dropout problems.
  • Check Device Manager for a yellow exclamation mark next to your network adapter, which means the driver is corrupted and needs reinstalling.
  • Disable power-saving mode on your WiFi adapter in Device Manager so Windows does not shut it down to save battery.
  • Move your PC closer to the router or reduce interference from microwaves and cordless phones, which broadcast on the same 2.4 GHz frequency as most WiFi.
  • If disconnections happen only at certain times or in certain rooms, the problem is usually signal strength or interference, not a hardware fault.

Restart your router and check the signal strength

Before you touch your PC, restart the router. Unplug the power cable, wait 30 seconds, and plug it back in. Let it fully boot — usually two to three minutes — then try connecting again. This clears the router's memory and often stops random disconnections.

While the router is booting, check the signal strength on your PC. Right-click the WiFi icon in the system tray (bottom right of the screen), select "Open Network & Internet settings", then click "WiFi" and look at the signal bars next to your network name. If you see fewer than three bars, you are too far from the router or there are too many walls between them. Move your PC closer or move the router to a more central location. If signal strength is not the problem, move to the next step.

Update or reinstall your network driver

Open Device Manager by right-clicking the Start button and selecting "Device Manager". Look for "Network adapters" and click the arrow to expand it. If you see a yellow exclamation mark next to any adapter, the driver is corrupted and needs reinstalling.

Right-click the adapter with the exclamation mark and select "Uninstall device". Check the box that says "Delete the driver software for this device" and click "Uninstall". Restart your PC. Windows will automatically reinstall the driver when it boots. If there is no yellow mark, right-click the adapter anyway and select "Update driver", then choose "Search automatically for updated driver software". Windows will check for a newer version online.

After the driver installs or updates, restart your PC again and test the connection for at least 30 minutes. If disconnections stop, the problem was the driver.

Turn off power-saving mode for your WiFi adapter

Windows can shut down your WiFi adapter to save battery power, which causes it to drop the connection and reconnect. This is especially common on laptops. Open Device Manager again, expand "Network adapters", right-click your WiFi adapter, and select "Properties".

Click the "Power Management" tab. Uncheck the box that says "Allow the computer to turn off this device to save power". Click "OK" and restart your PC. Test the connection for at least an hour. If you are using a desktop PC plugged into power, this step usually does not matter, but it is worth checking anyway.

Check for interference and switch WiFi channels

Microwaves, cordless phones, baby monitors, and some wireless speakers broadcast on the 2.4 GHz frequency, the same band most WiFi routers use. If you have any of these devices near your router or PC, they can cause disconnections. Move them away from the router if you can, or move the router away from them.

You can also try switching your router to a different WiFi channel. Log into your router's settings by opening a web browser and typing 192.168.1.1 or 192.168.0.1 into the address bar (check your router's label if neither works). Look for WiFi settings or "Channel" and try switching from channel 6 to channel 1 or 11 — these three channels do not overlap. Save the change and reconnect your PC. If disconnections improve, you found an interference problem.

Check Windows Update and disable fast startup

Open Settings by pressing Windows key + I. Go to "Update & Security" and click "Check for updates". Install any available updates and restart your PC. Outdated Windows versions sometimes have WiFi bugs that newer builds fix.

While you are in Settings, go to "System" and click "Power & sleep" on the left. Scroll down and click "Additional power settings". Click "Choose what the power button does" on the left, then click "Change settings that are currently unavailable". Uncheck "Turn on fast startup" and click "Save changes". Fast startup can interfere with WiFi reconnection. Restart your PC and test again.

Check your router's WiFi band and frequency

Older routers broadcast only on 2.4 GHz, which is crowded and more prone to interference. Newer routers broadcast on both 2.4 GHz and 5 GHz. If your router supports 5 GHz, try connecting to that network instead — it has more channels and less interference, though the signal does not travel as far.

Log into your router settings again and look for WiFi networks or SSID. You may see two networks listed: one ending in "2.4G" or "2.4" and one ending in "5G" or "5". Disconnect from the 2.4 GHz network on your PC, then connect to the 5 GHz network. Test for disconnections over several hours. If the 5 GHz network is stable, the problem was interference on 2.4 GHz.

Frequently Asked Questions

Why does my WiFi disconnect only at night or at certain times?

This usually means interference from a device that runs on a schedule — a microwave that runs at dinner time, a cordless phone that gets used in the evening, or a neighbor's WiFi that is stronger at certain hours. Try switching to the 5 GHz band if your router supports it, or move your router away from other electronics.

My WiFi drops every time I open a video or read something large

This often points to a router that is overheating or running out of memory. Restart the router and make sure it has airflow around it — do not put it in a closed cabinet. If the problem continues, the router may be failing and need replacement.

Does a WiFi extender or mesh system fix constant disconnections?

Not usually. If your PC is already close enough to connect, an extender will not solve a driver or interference problem. If your PC is far from the router and signal is weak, an extender or mesh system can help, but only after you have ruled out driver and power-saving issues.

Should I factory reset my router?

Only as a last resort. A factory reset erases all your settings and returns the router to its default password. Try all the steps above first. If nothing works and you suspect the router itself is failing, a factory reset is worth trying, but be prepared to set up your WiFi network from scratch afterward.

What if my PC disconnects from WiFi but other devices stay connected?

This points to a problem with your PC's driver or settings, not the router. Follow the driver update and power-saving steps above. If only your PC drops the connection while phones and tablets stay online, the router is working fine.