Why Wi-Fi is slow on a laptop and how to fix the speed

Slow Internet on a laptop computer is one of the most common problems that users face in everyday life. You open your browser, wait for the page to load, but instead see an endless spinning indicator. The situation gets worse when you try to watch a high-quality video or make a more important video call.

The reasons for low speed may be hidden both in the software of your device and in physical interference emanating from neighboring networks or household appliances. Often users mistakenly blame the provider, although the problem can be solved by simply adjusting the settings network card or updating drivers. To return the normal pace of work, it is necessary to take a systematic approach to diagnosis.

Diagnostics of the current state of the network and adapter

The first step should always be to check the actual speed and signal stability. You should not rely only on the indicator in the lower right corner of the screen, as it only shows the strength of the signal, but not its quality. Use specialized services to test channel throughput.

Run a speed test on a trusted resource, e.g. Speedtest.net or your provider's built-in test. Compare the numbers you get with the rate you pay for. If the difference is colossal, the problem is definitely not in the provider’s line, but in the local setup of your laptop.

Pay attention to how the connection behaves when moving from the router to the window. If the speed drops sharply after a few meters, it means your Wi-Fi adapter has a weak antenna or an outdated standard. Modern devices support 5 GHz bands, which provide much better speeds but shorter range.

• 📊 Check your speed via speedtest.net on different devices
• 📶 Compare the performance near the router and in the far room
• 🔍 Make sure the laptop is connected to a 5 GHz network and not 2.4 GHz

⚠️ Attention! Do not run a speed test with torrents, cloud syncs, or automatic Windows updates running in the background - this will skew the results.

Checking and updating network hardware drivers

The most common reason that the Internet slows down or falls off - these are outdated or incorrectly installed drivers. Laptop manufacturers often put software versions on their websites that are not optimized for new operating system updates.

Go to Device Manager, expand the “Network adapters” branch and find your Wi-Fi module. If there is a yellow exclamation mark next to it or the properties indicate that the device is working fine but the speed is slow, try updating the driver manually. Download the latest version from the laptop manufacturer's official website, e.g. Asus, Lenovo or Dell.

Sometimes a complete reset of the adapter settings helps. Disable the device in the device manager, restart the computer and let the system install the driver again. This often solves problems with energy-saving functions not working correctly.

• 🛠️ Use only official drivers from the manufacturer’s website
• 🔄 Completely uninstall the old version before installing the new one
• 💾 Check if your antivirus is blocking your network connection

📊 What operating system do you use?

• Windows 10
• Windows 11
• macOS
• Linux

Configure adapter power saving settings

Laptop manufacturers strive to save battery power, so they enable aggressive power saving modes by default. This leads to the fact that Wi-Fi module It periodically goes into sleep mode, which causes micro-tears and a drop in page loading speed.

To fix this, you need to go to the properties of the adapter in Device Manager and go to the “Power Management” tab. Uncheck the box next to “Allow the computer to turn off this device to save energy.” This will force the adapter to work at full capacity all the time.

It's also worth checking your system's power plan settings. In the “Energy Saving” mode, the operating frequency of the processor and network card is artificially reduced. Switch to High Performance mode to get maximum responsiveness.

• ⚡ Disable automatic adapter disabling in properties
• 🔋 Select the “High Performance” plan in Power Settings
• 📉 Check if the laptop is in Sleep mode when running on network power

☑️ Energy Saving Settings

Go to Device ManagerSelect adapter propertiesUncheck disableRestart laptop

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Selecting the optimal Wi-Fi channel and frequency

If you live in an apartment building, your router may operate on the same channel as dozens of neighboring networks. This creates powerful radio interference, due to which data packets are lost and require resending, which significantly reduces the actual speed.

The 2.4 GHz band is the most congested and has only three non-overlapping channels (1, 6, 11). It is best to switch your router to the 5 GHz band if your laptop and router support this standard. It is less noisy and provides significantly higher data transfer rates.

To analyze the ether, you can use special utilities, for example, WirelessMon or mobile applications like WiFi Analyzer. They will show which channels are busy and tell you at what frequency the signal will be clearer.

Why is the 5 GHz band better?

The 5 GHz band has significantly more channels (up to 25 non-overlapping channels), which reduces the likelihood of interference from neighbors. It also provides higher bandwidth, which is critical for video streaming and online gaming. However, its range is less than that of 2.4 GHz, and it penetrates walls worse.

Manually set the channel in the router settings if automatic selection does not work correctly. Often the system selects the busiest channel, considering it free due to the peculiarities of the algorithm.

Range	Number of channels	Speed	Penetration through walls	Interference from household appliances
2.4 GHz	3 disjoint	Low/Medium	High	High (microwaves, phones)
5 GHz	Many	High	Low	Minimum
6 GHz	Huge number	Maximum	Very low	None

⚠️ Attention! If you switch to 5GHz and lose signal in a far room, you will either have to move your router closer or install a repeater (signal booster).

💡

Before changing the channel on the router, take a screenshot of the current settings so that if something goes wrong, you can quickly return everything to how it was.

Software conflicts and background processes

Sometimes the problem lies not in the hardware, but in the software, which consumes the entire channel in the background. Windows 10 and 11 are actively used torrent clients to deliver updates, and also synchronize files in cloud storage.

Check Task Managerby pressing the key combination Ctrl + Shift + Esc. Sort processes by the Network column. If you see that some application is actively loading the channel, disable it or limit the speed. Often the culprits are Steam, Epic Games Launcher, or a browser with open tabs.

It's also worth checking for malware. Mining viruses or botnets can use your Internet connection to attack other servers, completely clogging the channel. Run a full antivirus scan.

• 🚫 Limit background updates in Windows settings
• 🦠 Check your system for viruses and spyware
• 🔒 Disable unnecessary browser extensions that may slow down loading

Hardware limitations and physical interference

If software methods do not help, perhaps your laptop simply does not meet modern speed standards. Older models are equipped with standard adapters 802.11n or even 802.11g, which physically cannot provide speeds higher than 100-150 Mbit/s even with an ideal signal.

External factors also play a role. Microwave ovens, baby monitors, wireless mice, and even aquariums can cause strong interference in the 2.4 GHz band. The location of the router in a metal cabinet or behind a thick concrete wall also critically affects speed.

The solution may be to purchase an external USB Wi-Fi adapter with a powerful antenna or replace the internal module, if technically possible. Make sure the new adapter supports the standard Wi-Fi 6 (802.11ax) for maximum performance.

Try moving the router to the center of the apartment or house, raising it to an elevated position. Avoid placing the device on the floor or in a corner of the room. Direct visibility between the router and laptop always gives the best results.

If all else fails, the problem may be with the router itself. Older models overheat and become unstable. Try replacing it with a more modern model that supports MU-MIMO and Beamforming.

Frequently asked questions (FAQ)