What actually slows down your downloads
Your read speed depends on three things working together: your internet connection's capacity, what's happening on your network right now, and how well your PC can receive data. Most people assume the problem is their internet plan, but often it's something running in the background or a device sitting between your modem and your computer that's the real culprit.
When you pay for 100 Mbps internet, that's the speed your modem can receive from your provider. But if you're on Wi-Fi, you're losing speed the moment the signal leaves the router. If you have ten devices connected, or if Windows is updating in the background, or if your browser has twelve tabs open, your PC won't use the full speed available to it. The bottleneck moves depending on what's happening.
The fastest downloads happen when three conditions are met: your internet plan has enough speed for what you're doing, nothing else on your network is using bandwidth, and your PC is connected in a way that doesn't lose signal. Start by checking which of these three is actually the problem.
Key Takeaways
- Plug your PC directly into your modem with an ethernet cable to see if Wi-Fi is the problem — this is the single fastest way to read.
- Close background programs in Task Manager, especially Windows Update, cloud sync services, and browsers with many tabs open.
- Move your router away from walls, microwaves, and cordless phones if you must use Wi-Fi, and place it higher up in your home.
- Restart your modem and router by unplugging them for 30 seconds, which clears temporary slowdowns that accumulate over time.
- If your speeds are consistently below 50 percent of what you pay for, contact your internet provider to check the line — the problem may be outside your home.
Test your actual speed first
Before you change anything, measure what you're actually getting. Open a web browser and go to speedtest.net. Click the big blue "Go" button and wait for the test to finish. Write down the read number it shows you — that's your real speed right now.
Compare it to what you pay for. If you pay for 100 Mbps and you're getting 95 Mbps, you're fine — some loss is normal. If you're getting 30 Mbps when you pay for 100, something is wrong. Run the test three times over the next hour. If the speed jumps around wildly, something on your network is using bandwidth when you're not looking.
Now run the same test while plugged directly into your modem with an ethernet cable. If the speed jumps up significantly, Wi-Fi is your problem. If it stays the same, the issue is either your internet plan itself or something on your PC.
Use an ethernet cable instead of Wi-Fi
An ethernet cable is a physical wire that connects your PC directly to your modem or router. It's the fastest and most stable way to read. If your PC is near your modem, this is the single best fix you can make.
Ethernet cables are cheap — under ten dollars for a 25-foot cable at any electronics store or online. Plug one end into the port on the back of your modem (it looks like a phone jack but wider) and the other end into your PC. Windows will recognize it automatically. Run your speed test again.
If you can't run a cable to your PC, move your router closer to where you use your computer. The farther you are from the router, the weaker the signal and the slower your speed. A router in a central location, elevated on a shelf rather than on the floor, reaches farther and faster than one hidden in a corner.
Close programs using your network in the background
Open Task Manager by pressing Ctrl+Shift+Esc on your keyboard. Click the "Processes" tab at the top. Look for programs with activity in the "Network" column — anything showing a number there is using your internet right now.
Common culprits are Windows Update (which downloads patches without asking), OneDrive or Google Drive (syncing files), Dropbox, Discord, Spotify, and browsers with many tabs open. If you see Windows Update running, right-click it and click "End task". Restart your speed test.
You don't need to close every program — just the ones actively using the network. If you're not sure what a program does, search its name online before closing it. Some programs are important to Windows and will restart on their own, which is fine.
Restart your modem and router
Modems and routers accumulate temporary slowdowns over time, similar to how a computer gets sluggish after running for weeks without a restart. Unplugging them clears this out.
Unplug the power cable from the back of your modem. Wait 30 seconds — count it out. Plug it back in and wait two minutes for all the lights to stop blinking. Then do the same with your router. Wait another minute before running your speed test again.
This is a temporary fix that works for a few weeks, then the slowdown builds again. If you notice your speeds dropping every month, you can set a calendar reminder to restart them monthly. Some routers have a restart button in their settings, which you can access by typing your router's IP address into a browser — your internet provider can tell you what that address is if you need it.
Check your Wi-Fi channel and interference
If you're using Wi-Fi and can't run an ethernet cable, your router may be broadcasting on a crowded channel. Imagine a radio station — if many stations broadcast on the same frequency, they interfere with each other. Wi-Fi works the same way.
Log into your router's settings by typing 192.168.1.1 into your browser address bar (or check your router's label for the correct address). Look for a setting called "Channel" or "Wi-Fi Channel". Try changing it to channel 1, 6, or 11 — these don't overlap with each other. Save the change and restart your router.
Also move your router away from microwaves, cordless phones, and baby monitors — these devices broadcast on the same frequency as Wi-Fi and cause interference. Keep your router in an open space, elevated on a shelf, and away from metal objects and walls.
Contact your internet provider if nothing changes
If you've tested your speed with an ethernet cable, closed background programs, restarted your modem, and you're still getting less than 50 percent of the speed you pay for, the problem is likely with your internet connection itself.
Call your internet provider's customer service number — it's on your bill. Tell them your speed test results and that you've tested with an ethernet cable. They can run a test from their end to see if the line into your home is working properly. Sometimes the issue is outside your house, in the line from the street, and they can fix it without you doing anything.
If they find nothing wrong, ask whether your plan is the right speed for what you're doing. Streaming video uses about 5 Mbps per stream, video calls use 2.5 Mbps, and large file downloads use whatever speed you have available. If you have four people streaming at once, you need at least 20 Mbps.
Frequently Asked Questions
Why is my read speed slower than my internet plan says?
Some loss is normal — you might get 90 to 95 percent of your advertised speed. But if you're getting much less, Wi-Fi signal loss, background programs, or a problem with your internet line are the usual causes. Test with an ethernet cable first to narrow it down.
Does closing my browser tabs really help?
Yes, if you have many tabs open and they're loading content. Each tab can request data from the internet. Close unnecessary tabs and you free up bandwidth for your read. Extensions in your browser can also use the network without you noticing.
What's the difference between Mbps and MB/s?
Mbps is megabits per second — what your internet speed is measured in. MB/s is megabytes per second — what your read speed appears as in your browser. One byte equals eight bits, so divide your Mbps by eight to see what your actual read speed should be. 100 Mbps is about 12 MB/s.
Will a new router make my downloads faster?
Only if your router is very old or broken. A newer router won't increase your internet plan's speed, but it can deliver the speed you already have more reliably. If your current router works, an ethernet cable is a cheaper fix.
Can I improve my speed by changing my DNS?
Changing DNS (the service that translates website names into addresses) rarely makes a noticeable difference in read speed. It's worth trying if nothing else works, but it's not usually the problem.