What slows down your downloads and how to fix it
Download speed depends on three things: your internet connection, what's happening on your network right now, and your PC's hardware. Most slow downloads come from network congestion — other devices using bandwidth, background programs uploading data, or your router struggling to reach your PC. Before you call your internet provider, check what's actually running and where your PC is positioned relative to your router.
The fastest fix is usually the simplest: move closer to your router, close programs using the internet, or restart your router. If those don't work, the problem may be your PC's storage drive filling up, your network adapter settings, or interference from other wireless devices. This guide walks through each cause and the specific steps to address it.
Key Takeaways
- Restart your router by unplugging it for 30 seconds, then plugging it back in — this clears temporary congestion and often restores speed immediately.
- Check what programs are using your internet by opening Task Manager, clicking the Network column header to sort by usage, and closing anything unexpected.
- Move your PC closer to your router or switch from Wi-Fi to a wired Ethernet connection, which is faster and more stable for large downloads.
- Clear your browser cache and temporary files, which can slow downloads if your storage drive is nearly full.
- If speed remains slow after these steps, run a speed test at speedtest.net to see whether the problem is your internet connection or your PC.
Restart your router and modem
A router that has been running for weeks accumulates temporary data and connections that slow everything down. Restarting clears this buildup and often restores speed within minutes.
Unplug your modem (the device your internet provider gave you) and your router (the wireless device) from power. Wait 30 seconds — this matters, as it fully drains the devices' memory. Plug the modem back in first and wait two minutes for it to fully restart, then plug in the router and wait another two minutes. Your internet should return to normal speed.
If you have a combined modem-router unit, unplug that single device for 30 seconds instead. This single step fixes slow downloads about half the time.
Close programs using your internet
Background programs constantly upload or download data without you noticing — cloud sync services, Windows Update, antivirus scans, and streaming apps all compete for bandwidth. Closing them frees up speed for your downloads.
Open Task Manager by pressing Ctrl+Shift+Esc. Click the Network column header to sort programs by how much internet they're using. Look for anything using more than a few percent — common culprits are OneDrive, Dropbox, Windows Update, and Discord. Right-click each one and select End Task. Check back in a few minutes to see if your download speed improved.
After you finish downloading, you can restart these programs. If Windows Update keeps restarting, go to Settings > Update & Security > Windows Update and click Pause Updates for 7 Days to stop it from interfering during large downloads.
Switch to a wired connection
Wi-Fi is convenient but slower and less stable than a direct Ethernet cable. If your PC is near your router, plugging in an Ethernet cable often doubles download speed.
Buy a Cat6 Ethernet cable long enough to reach from your router to your PC — they cost $10 to $20 and are available at any electronics store. Plug one end into your router and the other into the Ethernet port on your PC (usually on the back of a desktop or the side of a laptop). Windows will automatically detect the connection and switch to it.
If you can't run a cable, move your PC closer to the router or move the router to a more central location in your home. The farther you are from the router, the weaker the signal and the slower your speed. Walls, metal objects, and other wireless devices (microwaves, cordless phones) also weaken Wi-Fi — moving away from these helps.
Check your storage drive for free space
A nearly full hard drive slows downloads because Windows needs space to write the incoming data. If your drive is more than 90 percent full, clearing space often noticeably improves speed.
Right-click your C: drive in File Explorer and select Properties. Look at the pie chart — if the blue section (used space) takes up most of the circle, you need to free up space. Delete large files you no longer need, empty your Recycle Bin, and uninstall programs you don't use. You can also run Disk Cleanup: press Windows Key + R, type cleanmgr, and click OK. Check the boxes for Temporary Files, Recycle Bin, and Old Windows Installations, then click Delete Files.
Aim to keep at least 10 percent of your drive free. If your drive is nearly full and you can't delete anything, consider adding an external hard drive or upgrading to a larger internal drive.
Update your network adapter driver
Your network adapter is the hardware that connects your PC to the internet. Outdated drivers can limit speed. Updating them sometimes improves download performance.
Right-click the Start button and select Device Manager. Expand Network Adapters and look for your adapter — it usually has "Ethernet" or "Wi-Fi" in the name. Right-click it and select Update Driver. Choose Search Automatically for Updated Driver Software and let Windows search. If an update is found, install it and restart your PC.
You can also visit your PC manufacturer's website (Dell, HP, Lenovo, Asus, etc.) and download the latest network driver from their support page. This is more reliable than Windows Update if you have an older PC.
Run a speed test to identify the real problem
After trying the steps above, run a speed test to see whether your download speed has improved and whether the remaining slowness is your internet connection or your PC.
Go to speedtest.net in your browser and click the large blue Begin Test button. Wait 30 to 60 seconds for the test to finish. The result shows your download speed in Mbps (megabits per second). Compare this to the speed your internet provider promises — if the test shows significantly less, the problem is your internet connection, not your PC. If the test shows normal speed but your downloads are still slow, the problem is your PC's settings or hardware.
If your speed test is much lower than expected, restart your router again and run the test a second time — sometimes the first test catches temporary congestion. If it remains low after a second test, contact your internet provider with your speed test results.
Frequently Asked Questions
Why is my download speed slower than my internet speed?
Download speed tests measure your connection to a server, but actual downloads depend on the server's speed too. A slow website or server can't send data faster than it's capable of, even if your connection is fast. Also, browsers and antivirus software sometimes limit download speed for security. If speed tests show normal speed but downloads are slow, try a different browser or temporarily disable your antivirus.
Does closing browser tabs improve download speed?
Closing tabs frees up a small amount of RAM and CPU, but usually doesn't noticeably improve download speed unless you have dozens of tabs open. The bigger impact comes from closing programs that use the internet, like cloud sync services and streaming apps. Closing browser tabs helps more on older PCs with limited RAM.
Should I use a download manager to speed up downloads?
Download managers like Internet Download Manager can sometimes speed up downloads by splitting the file into multiple parts and downloading them in parallel. However, many websites block this behavior, and it rarely helps with modern internet connections. Try the steps in this guide first — they usually work better and don't require new software.
Can malware slow down my downloads?
Yes, malware can consume bandwidth in the background or limit your connection speed. Run a full scan with Windows Defender (built into Windows) or Malwarebytes to check for infections. Go to Settings > Update & Security > Windows Security > Virus & Threat Protection and click Scan Options, then select Full Scan. This takes 30 minutes to an hour but catches most malware.
What's the difference between download speed and internet speed?
Internet speed is the maximum your connection can handle. Download speed is what you actually get when downloading a specific file, which depends on the server sending it, network congestion, and your PC's settings. A 100 Mbps internet connection might show 95 Mbps on a speed test but only 50 Mbps when downloading from a slow server.