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How to Fix a Slow Internet Connection on Your Computer

October 9, 2026 · LuxuriousComputers Repair

Your internet is slow. Web pages take a long time to load, videos buffer constantly, downloads crawl, and online meetings lag. The problem may affect your entire network or just one specific computer while other devices work fine. If the slow internet is isolated to one computer, the cause is on that machine — a network adapter issue, a software conflict, DNS settings, or malware consuming bandwidth. If all devices are slow, the issue is with your router, modem, or internet service provider.

Test your actual speed

• Before troubleshooting, measure your current internet speed. Open a browser and search for speed test. Run the test and note the download speed, upload speed, and ping. Compare these numbers to what your internet plan promises
• If the speed test shows numbers close to your plan speed, the internet connection itself is fine and the slowness you experience is caused by something else — a slow WiFi connection between the computer and router, a congested network with too many devices, or a specific website or service being slow
• Run the speed test on multiple devices. If your phone on WiFi gets full speed but the computer does not, the problem is the computer. If all devices are slow, the problem is the network or ISP

Restart the router and modem

• Power cycling the router and modem clears their memory, resets network connections, and often resolves speed problems caused by firmware bugs or connection table overflow. Unplug the modem first, wait 30 seconds, plug it back in and wait for it to fully boot (all status lights stable). Then unplug the router, wait 30 seconds, and plug it back in
• If you have a combined modem-router unit, unplug it for 30 seconds and plug it back in. Wait 2 to 3 minutes for it to fully reconnect to your ISP before testing
• Routers that have been running for weeks or months without a restart can develop memory leaks and connection tracking problems that degrade performance. A monthly restart can prevent gradual speed degradation

Switch from WiFi to Ethernet

• WiFi is always slower than a wired Ethernet connection due to signal interference, distance from the router, walls and obstacles, and shared bandwidth with other wireless devices. If possible, connect the slow computer to the router with an Ethernet cable and test the speed
• If Ethernet is significantly faster than WiFi, the problem is the wireless connection, not your internet service. Improving WiFi involves moving closer to the router, reducing interference from other devices, changing the WiFi channel, or upgrading to a better router
• If Ethernet speed is also slow, the problem is upstream — either the router, the modem, or the ISP connection

Change the DNS server

• DNS (Domain Name System) translates website names into IP addresses. If your ISP DNS server is slow, every website takes longer to start loading because the name lookup takes extra time. Switching to a faster DNS server can noticeably improve browsing speed
• Open Settings, Network and Internet, and click on your active connection (WiFi or Ethernet). Click Edit next to DNS Server Assignment. Change from Automatic to Manual. Enable IPv4 and enter a faster DNS server. Common fast DNS options include 1.1.1.1 and 1.0.0.1 from Cloudflare or 8.8.8.8 and 8.8.4.4 from Google
• After changing DNS, open Command Prompt and type ipconfig /flushdns and press Enter. This clears the old DNS cache and forces the computer to use the new DNS server immediately

Check for bandwidth-consuming programs

• Background programs may be consuming your bandwidth without your knowledge. Cloud sync services (OneDrive, Google Drive, Dropbox), automatic Windows Updates, game launchers updating games, and streaming services in background tabs all use bandwidth
• Open Task Manager and click the Network column to sort by network usage. Identify any program using significant bandwidth. If a program is downloading a large update, you can pause it or schedule it for later
• Windows Update can consume substantial bandwidth while downloading and installing updates. Open Settings, Windows Update, and check if an update is downloading. You can pause updates temporarily if you need bandwidth for other tasks

Disable metered connection throttling

• If you set your network connection as Metered in Windows (common on laptop WiFi), Windows restricts background data usage including update downloads and some app syncing. While this saves bandwidth, it can also cause some services to throttle themselves unnecessarily
• Check Settings, Network and Internet, your connection properties, and verify Metered Connection is set appropriately. On home broadband with unlimited data, this should be off

Update the network adapter driver

• An outdated or corrupted network driver can cause slow speeds, dropped connections, and high latency. Open Device Manager, expand Network Adapters, right-click your WiFi or Ethernet adapter, and select Update Driver
• For the best performance, download the latest driver from the adapter or laptop manufacturer website rather than relying on Windows Update. Manufacturer drivers often include performance optimizations and bug fixes not available in the generic Windows driver
• If the slow speed started after a Windows Update, the update may have installed an incompatible driver. Roll back the driver in Device Manager: open adapter properties, Driver tab, Roll Back Driver

Reset the network stack

• Corrupted network settings can cause persistent slow speeds. Open Command Prompt as Administrator and run the following commands in sequence: netsh winsock reset, then netsh int ip reset, then ipconfig /release, then ipconfig /renew, then ipconfig /flushdns. Restart the computer after running all commands
• These commands reset the Windows Sockets catalog, reset TCP/IP stack settings, release and renew the IP address, and flush the DNS cache. This clears any corrupted network configuration that may be throttling speed

Check for malware

• Malware can consume bandwidth by uploading your data to remote servers, participating in botnets, mining cryptocurrency, or downloading additional malicious payloads. If your internet became slow suddenly with no other explanation, run a full malware scan
• Open Windows Security, Virus and Threat Protection, Scan Options, and run a Full Scan. Also consider running a scan with a second-opinion scanner like Malwarebytes to catch threats that Windows Defender may miss
• Check Task Manager for unfamiliar processes using significant network bandwidth. Research any suspicious process names online before taking action

Optimize WiFi settings

• If you are on WiFi, the channel your router uses may be congested. In apartment buildings and dense neighborhoods, many routers compete on the same channel. Log into your router admin page (usually 192.168.1.1 or 192.168.0.1) and change the WiFi channel. For 2.4 GHz, channels 1, 6, and 11 are the only non-overlapping channels. For 5 GHz, there are more channels with less congestion
• If your router supports both 2.4 GHz and 5 GHz bands, connect to the 5 GHz network when close to the router. The 5 GHz band offers faster speeds with less interference but has shorter range. The 2.4 GHz band has better range but is more congested and slower
• WiFi 6 (802.11ax) routers and adapters offer significantly better performance in congested environments compared to WiFi 5 (802.11ac). If your router or computer adapter is several years old, upgrading may improve wireless speeds

Need help with slow internet?

If your internet connection is slow and the troubleshooting steps above have not resolved the issue, LuxuriousComputers Repair can diagnose network adapter problems, optimize your network settings, check for bandwidth-consuming software, and configure your connection for the fastest possible speed.