Low Wi-Fi speed on a laptop: causes and solutions

Have you noticed that on your laptop the Internet is connected via Wi-Fi Is it significantly slower than on other devices? Pages take forever to load, videos slow down, and online games lag - is this a familiar situation? The problem may lie both in the settings of the laptop itself and in external factors: from an overloaded router to an outdated network card driver.

In this article we will look at all possible reasons for the drop in Wi-Fi speed on laptops (as opposed to desktop PCs or smartphones), including hardware limitations, software glitches, and wireless networking features. You will receive clear instructions on how to diagnose the problem and fix it without calling a technician - from simple actions like rebooting the router to fine-tuning adapter settings.

Important: if the speed drops only on one laptop, and other devices work fine - the problem is almost certainly in the laptop itself. If everything connected to Wi-Fi slows down, the router or provider is to blame. We will teach you to distinguish one from the other.

1. Checking real speed: tests and comparisons

Before digging into the settings, make sure that the problem really exists. Users often confuse objective drop in speed with subjective feelings (for example, when a site slows down due to its optimization). Take measurements:

• 📊 Speedtest.net or Yandex Internetometer — run the test on a laptop and compare with the results on a smartphone (connected to the same Wi-Fi). Is the difference more than 2 times? So the problem is in the laptop.
• 🔄 Multiple test: Run the scan 3-5 times in a row at different times of the day. If the speed “jumps” from 10 to 100 Mbit/s, interference or router settings are to blame.
• 🖥️ Direct connection: connect the laptop to the router via Ethernet cable. If the speed increases, the problem is in the Wi-Fi adapter or its settings.

Pay attention to the parameter Ping (delay). If it is higher than 50 ms when connecting to the nearest server, this is a sign network congestion or problems with the adapter driver. Also check Jitter (ping variability): values above 20 ms indicate an unstable connection.

2. Hardware limitations: why the laptop slows down Wi-Fi

Many users do not take into account that economy class laptops (especially models older than 5 years) are often equipped with weak Wi-Fi adapters. For example, standard adapters 802.11n (Wi-Fi 4) are physically unable to exceed speeds of 150–300 Mbps, even if the router supports Wi-Fi 6 (up to 9.6 Gbit/s).

How to check your adapter:

1. Click Win + R, enter devmgmt.msc and find the section Network adapters.
2. In the name, look for models like Intel Wireless-AC 9560, Qualcomm Atheros QCA61x4 or Realtek RTL8821CE.
3. Copy the name and check its maximum speed on Google. For example, Intel AX200 supports up to 2.4 Gbps, and Realtek RTL8188EE - only 150 Mbit/s.

Wi-Fi standard	Max. speed	Frequency	Example of adapters
802.11n (Wi-Fi 4)	150–600 Mbit/s	2.4 GHz	Realtek RTL8192CE, Broadcom BCM4313
802.11ac (Wi-Fi 5)	up to 1.3 Gbit/s	5 GHz	Intel Wireless-AC 8265, Qualcomm QCA6174
802.11ax (Wi-Fi 6)	up to 9.6 Gbit/s	2.4/5/6 GHz	Intel AX200/AX210, Killer AX1650

⚠️ Attention: if your laptop only supports 2.4 GHz, and the router works on 5 GHz (or vice versa), the speed will drop by 2-3 times due to incompatibility. Check your router settings!

How can I find out which Wi-Fi standard my router supports?

This information is usually found on a sticker on the back of the device (look for words like “802.11ac” or “Wi-Fi 5”). You can also go to the router’s web interface (usually at 192.168.1.1) and look at the “Wireless Network” or “Wireless” section.

3. Network adapter drivers: update and rollback

About 40% of Wi-Fi problems on laptops are related to outdated or damaged drivers. Manufacturers regularly release updates that correct compatibility issues with new standards (for example, Wi-Fi 6E) or routers of specific brands (ASUS, TP-Link, Keenetic).

How to update the driver:

• 🔍 Automatically: open Device Manager → find the network adapter → right click → Update driver → Automatic search.
• 💻 Manually: Download the latest version from the laptop manufacturer's website (Lenovo, HP, Dell) or chip (Intel, Qualcomm). For example, for Intel AX200 take the driver here.
• 🔄 Rollback: If the problem appeared after updating, go back to the previous version of the driver (in the same menu, select Properties → Rollback).

⚠️ Attention: never install drivers from third party sites (like DriverPack Solution). They often contain viruses or outdated versions. Use only official sources!

4. Router settings: channels, standards and signal strength

Even if the laptop is working properly, incorrect router settings can “choke” speed. For example, if in the settings you select Auto for a Wi-Fi channel, the router may constantly switch to overloaded frequencies, which leads to lags.

Optimal settings for maximum speed:

• 📶 Channel: Manually select the least busy channel (use apps like Wi-Fi Analyzer for analysis). For 2.4 GHz better channels 1, 6 or 11; for 5 GHz - 36–48 or 149–165.
• 🔄 Channel width: for 5 GHz install 80 MHz (if the router supports), for 2.4 GHz — 20/40 MHz.
• 🔒 Security mode: use WPA2-AES or WPA3. TKIP or WEP reduce speed by 30–50%!
• 📡 Transmission power: in some routers (for example, ASUS RT-AX88U) you can increase the signal strength to 100% (the default is often 75%).

Also check if the router is enabled energy saving mode (For example, Green Mode or Eco Mode). It reduces transmitter power to reduce power consumption, but also speed.

5. Interference and physical obstacles: how they affect speed

Wi-Fi is a radio signal that is weakened by obstacles and interference. If the laptop is in a different room from the router, and between them concrete walls or metal structures, the speed may drop by 5–10 times. Also influence:

• 📱 Other devices: microwave ovens, wireless headphones, baby monitors and even neighboring Wi-Fi networks on the same channel.
• 🔌 Electrical wiring: If the router and laptop are connected to the same outlet via an extension cord, interference may occur.
• 🌳 Plants and aquariums: water perfectly absorbs the signal 5 GHz (up to 90% losses!).
• 🚪 Metal doors: Even a thin sheet of metal can block the signal completely.

How to improve coverage:

1. Move the router to center of the apartment and raise it to a height of 1–1.5 meters (for example, onto a cabinet).
2. Use repeater (signal repeater) or Mesh system (For example, TP-Link Deco), if the room area is more than 70 m².
3. Change the router antennas to more powerful ones (for example, with a gain 9 dBi instead of standard 5 dBi).

6. Software conflicts: antiviruses, VPNs and background processes

Sometimes it's not the hardware that's to blame, but software. For example, some antiviruses (Kaspersky, Avast) scan all traffic, which can reduce speed by 20–40%. Also influence:

• 🛡️ VPN services: connecting to foreign servers increases ping and reduces download speed.
• 🖥️ Background updates: Windows Update, Steam or Epic Games can secretly download files, occupying the channel.
• 🎮 Torrent clients: Even in an inactive state, they often hold hundreds of connections, overloading the network.
• 🔄 Proxy servers: If a proxy is specified in the network settings, this may limit the speed.

How to check:

1. Open Task Manager (Ctrl + Shift + Esc) → tab Network. See which programs are consuming traffic.
2. Temporarily disable your antivirus and check your speed again.
3. If you are using a VPN, connect to a server in your region (for example, in Moscow if you are in Russia).

⚠️ Attention: if in Task Manager you see the process svchost.execonsuming a lot of traffic is Windows Update. Pause updates in Settings → Update & Security.

7. Power settings: why Windows “saves” Wi-Fi

Power Saving Mode in Windows may limit the performance of the Wi-Fi adapter to save battery power. This is especially true for laptops Windows 10/11, where the option is enabled by default Allow this device to turn off to save power.

How to disable restrictions:

1. Open Device Manager → find your Wi-Fi adapter.
2. Right click → Properties → tab Power management.
3. Uncheck Allow this device to turn off to save power.
4. Go to Control Panel → Power Options and select a scheme High performance.

Also check your power plan settings:

powercfg /query

Look for options related to Wireless Adapter Settings. If it's there Low Power - change to Maximum Performance.

FAQ: Frequently asked questions about slow Wi-Fi on a laptop

Why is Wi-Fi fast on my phone, but slow on my laptop?

This is a clear sign of a problem with Wi-Fi adapter driver on a laptop or his hardware limitations. First update the driver (see section 3), then check the adapter standard (section 2). If it is outdated (for example, Wi-Fi 4), even the fastest router will not help - you need an external USB adapter (for example, TP-Link Archer T3U).

Could a virus cause slow Wi-Fi speed?

Yes, some viruses (for example, trojan-proxy or botnet miners) use your laptop to send spam or mine cryptocurrency, consuming traffic. Check the system Malwarebytes or Kaspersky Virus Removal Tool. Also look at Task Manager, whether there are any suspicious processes with high network consumption.

Why does the speed drop in the evening, but during the day everything is fine?

This is due to provider channel overload or router. In the evening, all your neighbors actively use the Internet, and if you 2.4 GHz, the channels are overloaded. Solutions:

• Go to 5 GHz (if the router supports it).
• Ask your provider to switch you to a tariff with a guaranteed speed (for example, "Unlimit 300" instead of "Standard 100").
• Enable in router QoS (Quality of Service) and prioritize traffic for your laptop.

Will replacing a router help increase speed on a laptop?

Depends on the reason. If your current router is older than 5 years and only supports Wi-Fi 4, replacement with a model with Wi-Fi 6 (For example, ASUS RT-AX55 or TP-Link Archer AX21) can increase speed by 2–3 times. But if the problem is laptop adapter (for example it only supports 150 Mbit/s), a new router will not help - you need to change the adapter.

What to do if nothing in the article helped?

If you have tried everything, but the speed remains low:

1. Test the laptop on another Wi-Fi (for example, in a cafe or with friends). If everything is fine there, the problem is with your router or provider.
2. Connect your laptop to the router via Ethernet. If the speed has increased, the Wi-Fi adapter is to blame (it may need to be replaced).
3. Contact your provider and ask them to check the line. Sometimes the problem lies in a damaged cable or a malfunction on the operator's side.