Your phone pulls 150 Mbps. Your laptop gets a depressing 8. Same router. Same room. There are real, fixable reasons for this — and they're almost never the router's fault.
Laptop WiFi is almost always slow for one of four reasons: Windows is throttling your WiFi adapter to save battery, your network driver is outdated, your laptop is stuck on the slower 2.4 GHz band, or background apps are quietly draining your bandwidth. The fix usually takes under five minutes once you know where to look.
Here's a thing that drives people quietly insane: you run a speed test on your phone and it says 189 Mbps. You switch to your laptop, same WiFi network, sitting three feet from the router — and you get 4 Mbps. Maybe 6 on a good day.
It feels like the laptop is broken. But it's usually not. The problem is almost always software behaving in ways it wasn't designed to explain to you.
Your phone is a simple device in WiFi terms. It connects, it downloads, it doesn't second-guess itself. Your laptop is running Windows, which has approximately 11,000 settings that can quietly throttle your connection — most of them enabled by default, none of them with an obvious "this is why you're slow" label.
A real-world example from a Windows 11 forum: one person's phone hit 189 Mbps on the same network where their laptop was stuck at 3.46 Mbps. Same router. Same channel. Same chair. The fix was a driver update and one power setting change.
This is the most common cause, and it sounds almost absurd when you hear it. Windows has a feature called Power Saving Mode for your wireless adapter. When active, it intentionally slows down your WiFi to save battery — even when you're plugged in.
The result is exactly the kind of behavior that makes no sense: slowdowns for no reason, downloads that stall mid-transfer, video calls that drop choppy even when you haven't moved. Windows expert sites have described it as "Windows putting your WiFi adapter on a short leash." Apt.
This setting often resets after a Windows Update. Even if you've fixed it before, it can come back. Check it any time your laptop WiFi mysteriously degrades.
Network drivers are small pieces of software that tell Windows how to talk to your WiFi card. An outdated or corrupted driver can cap your speeds, cause random disconnects, or make your connection unpredictable in ways that don't respond to any obvious fix.
This is especially common on Windows 11, which has had documented issues with certain WiFi adapters since the 22H2 update. One user reported that their laptop worked fine on Windows 10 and then became nearly unusable on Teams calls after upgrading — restarting the WLAN Autoconfig service fixed it temporarily, but the real fix was a fresh driver from Intel directly.
Most modern routers broadcast two networks: 2.4 GHz (slower, longer range) and 5 GHz (faster, shorter range). Your phone probably auto-selects 5 GHz. Your laptop might be clinging to 2.4 GHz — especially if your router broadcasts both bands under the same name and lets the device choose.
The speed difference is significant. Think of 2.4 GHz as a two-lane country road and 5 GHz as a motorway. Same destination, very different journey.
Dropbox syncing 4,000 photos. Windows Update downloading quietly in the background. OneDrive backing up your desktop. Your antivirus scanning every file you download as it arrives. Any one of these can quietly eat 20–40 Mbps without showing you a single notification.
Open Task Manager, click on the Network column, and sort by highest usage. What you find there is often the culprit.
There's a Windows feature called Delivery Optimization that uses your internet connection to help distribute Windows Updates to other PCs nearby — peer-to-peer style. It's on by default. Most people have no idea. It's not malicious. But it does take a piece of your bandwidth.
Don't immediately blame the router when only your laptop is slow. If your phone and another device are both fast on the same WiFi, the router is almost certainly innocent.
If you have a mesh network or multiple WiFi access points at home, this one can sneak up on you. Windows controls how aggressively your laptop switches between access points when it detects a weaker signal. Set too conservatively, your laptop will cling to a distant, weak node long after a closer, stronger one is available.
The result looks like bad WiFi coverage, but the actual problem is Windows being too loyal to the wrong access point.
Start at the top. Stop when your speed is fixed. No need to do all of them — most people solve it in the first two steps.
Go to Control Panel → Power Options → Change plan settings → Advanced settings → Wireless Adapter Settings → Power Saving Mode → set to Maximum Performance.
Device Manager → Network adapters → right-click your WiFi adapter → Update driver. Or visit your laptop manufacturer's support site and grab the latest directly. Intel's site works for Intel-based cards.
In Device Manager → Network adapters → WiFi adapter Properties → Advanced tab → find "Preferred Band" or "Band" setting → set to 5 GHz. Or just connect to your router's separate 5 GHz SSID if it has one.
Open Command Prompt as Administrator and run: ipconfig /flushdns then netsh winsock reset then netsh int ip reset. Restart after. Old DNS cache can surprisingly drag everything down.
Settings → Windows Update → Advanced Options → Delivery Optimization → toggle off "Allow downloads from other PCs." This stops Windows from using your connection to help distribute updates to neighbors.
Task Manager → Startup Apps → disable Dropbox, OneDrive, cloud backup tools, or any sync service you don't actively use. Restart and recheck your speed.
In Device Manager → WiFi adapter → Advanced tab → find "Roaming Aggressiveness" → set to Medium-High or High. This tells Windows to switch to the nearest access point faster instead of staying on a distant weak one.
These aren't theoretical numbers. They're typical results from the same laptop before and after the fixes above, based on community-reported data from Windows forums and support threads.
| Cause | Typical Speed Impact | Fix Time | Difficulty |
|---|---|---|---|
| WiFi power saving mode | Can cut speeds by 80–95% | 2 min | Easy |
| Outdated network driver | Unpredictable — often severe | 5–10 min | Easy |
| Stuck on 2.4 GHz band | 3–5× slower than 5 GHz | 2 min | Easy |
| Background bandwidth hogs | 10–40 Mbps drain | 5 min | Easy |
| Delivery Optimization on | 5–20 Mbps drain | 1 min | Easy |
| Bad roaming aggressiveness | Intermittent drops & slowness | 3 min | Moderate |
Answer two questions and we'll point you to the most likely cause.
Select the options that best describe your situation