Step-by-Step Guide to Troubleshooting Slow Broadband Speeds

March 21st, 2024
Step-by-Step Guide to Troubleshooting Slow Broadband Speeds

Slow broadband speeds can be incredibly frustrating, especially when they impact your ability to work, stream, or communicate online. If you're experiencing sluggish internet performance, it's essential to systematically troubleshoot the issue to identify the root cause and implement the appropriate solution. This step-by-step guide will help you diagnose and fix common problems affecting your broadband speed, including slow internet connection, by optimising your network, Wi-Fi, and Ethernet connection.

Run a Speed Test

The first step in troubleshooting slow broadband speed is to run a speed test to determine your current download and upload speeds. This will give you a baseline measurement to compare against your ISP's advertised speeds and help you gauge the severity of the issue.

To run a speed test:

  1. Connect your device directly to your modem or router using an Ethernet cable for the most accurate results.
  2. Close any unnecessary applications and stop any ongoing downloads or uploads.
  3. Visit a reliable speed testing website, such as or
  4. Click the "Go" or "Start" button to begin the test.
  5. Wait for the test to complete and record your download and upload speeds, as well as your ping (latency).

Compare your speed test results to your ISP's advertised speeds and the minimum requirements for your intended online activities. If there is a significant discrepancy, proceed with the following troubleshooting steps.

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Reboot(Simple restart) Your Modem and Router

One of the simplest and most effective ways to resolve slow broadband speeds is to restart your modem and router. This clears any temporary glitches or connection issues that may be impacting your internet performance.

To reboot your modem and router:

  1. Unplug the power cables from both devices.
  2. Wait for a minimum of 30 seconds to one minute.
  3. Plug the power cable back into your modem and wait for it to fully restart (indicated by solid lights).
  4. Once the modem is online, plug the power cable back into your router and wait for it to restart.
  5. Test your internet connection and run another speed test to see if the issue is resolved.

Reboot Simple restart Your Modem and Router

Check for Signal Interference

Signal interference can significantly impact your broadband speed, especially if you're using a Wi-Fi connection. Common sources of interference include cordless phones, microwaves, Bluetooth devices, and neighbouring Wi-Fi networks.

To resolve signal interference:

  1. Move your router to a central location, away from walls and obstructions.
  2. Keep your router away from other electronic devices, especially those that operate on the same frequency (2.4 GHz or 5 GHz).
  3. Consider switching to a wired Ethernet connection for devices that don't require mobility, such as desktop computers or gaming consoles.
  4. If you're using a 2.4 GHz Wi-Fi network, try changing your router's channel to one with less interference, such as channel 1, 6, or 11.

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Update Your Wireless Router's Firmware

Outdated router firmware can cause performance issues and security vulnerabilities. Regularly updating your router's firmware ensures that you have the latest bug fixes, performance enhancements, and security patches.

To update your router's firmware:

  1. Check your router manufacturer's website for the latest firmware version and release notes.
  2. Download the firmware file and save it to your computer.
  3. Log in to your router's admin panel (usually accessible via a web browser).
  4. Navigate to the firmware update section and follow the instructions to upload and install the new firmware.
  5. Wait for the update process to complete and for your router to restart.
  6. Test your internet connection and run a speed test to see if the firmware update has improved your broadband speed.

Scan for Malware and Viruses

Malware and viruses can consume your bandwidth and slow down your broadband speed without your knowledge. Regular scans and updates of your antivirus and anti-malware software can help detect and remove these threats.

To scan for malware and viruses:

  1. Ensure that your antivirus and anti-malware software updates is up to date.
  2. Run a full system scan on all connected devices.
  3. Quarantine or remove any detected threats.
  4. Consider running additional scans with reputable online tools, such as Microsoft Safety Scanner or Malwarebytes.

Optimise Your Browser and Disable Bandwidth-Hungry Extensions

Your web browser and its extensions can significantly impact your browsing speed and overall broadband performance. Improving your browser settings and disabling bandwidth-hungry extensions can help improve your internet speed.

To improve your browser:

  1. Clear your browser cache, cookies, and browsing history.
  2. Disable or remove unnecessary extensions and add-ons.
  3. Enable hardware acceleration in your browser settings (if available).
  4. Consider using a lightweight browser, such as Google Chrome or Mozilla Firefox, for faster browsing and internet access.

Check for Network Congestion

Network congestion can occur when too many devices are connected to your network or when there is a high demand for bandwidth in your area. This can result in slower broadband speeds, particularly during peak usage hours.

To check for network congestion:

  1. Disconnect unused devices from your network to reduce the number of connected devices (such as baby monitors, pc, laptop, etc).
  2. Run speed tests at different times of the day to identify patterns in network congestion.
  3. Contact your ISP to inquire about any known network issues or maintenance in your area.
  4. Consider upgrading your broadband plan or switching to a provider with better network infrastructure if congestion is a persistent issue.

Check for Network Congestion

Upgrade Your Hardware

Outdated hardware, such as old modems, routers, or network adapters, can bottleneck your broadband speed. Upgrading to newer, more efficient hardware can help you maximize your internet performance.

To upgrade your hardware:

  1. Check with your ISP for a list of compatible modems and routers.
  2. Research and compare hardware options based on your specific needs and budget.
  3. Purchase and install the new hardware, following the manufacturer's instructions.
  4. Run a speed test to verify that your new hardware is delivering the expected performance improvements.

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Contact Your Internet Service Provider

If you've exhausted all the above troubleshooting steps and are still experiencing slow broadband speeds, it may be time to contact your ISP. They can help identify any issues with your connection, service outages, or network problems that may be impacting your speed.

When contacting your ISP:

  1. Have your account information and speed test results ready.
  2. Clearly explain the issues you're experiencing and the troubleshooting steps you've already taken.
  3. Ask if there are any known outages or maintenance in your area.
  4. Inquire about upgrading your plan or hardware to improve your broadband speed.
  5. If the issue persists, consider filing a formal complaint or exploring alternative ISPs in your area.

Slow Broadband Speed Statistics

Issue Percentage of Users Affected
Slow download speeds 35%
Slow upload speeds 21%
Intermittent connectivity issues 27%
Wi-Fi signal strength or interference 18%
High latency or ping 11%

Source: Ofcom Home Broadband Performance Report, 2021

The table above highlights the most common issues affecting broadband speeds in the UK. Slow download speeds are the most prevalent, affecting 35% of users, followed by intermittent connectivity issues at 27%. By systematically troubleshooting these issues, you can identify the root cause of your slow broadband speed and take the necessary steps to improve your internet performance.

Ethernet connection Over Wifi

When opting for a more reliable and speedier connection, transitioning from a Wi-Fi connection to an Ethernet cable is highly recommended. Unlike Wi-Fi signals that can be susceptible to interference from various factors such as other electronic devices, physical obstructions like walls, and the distance between your device and the router, an Ethernet cable offers a direct and stable link between your device and the router. This direct connection ensures faster speeds and a more consistent network performance. By using an Ethernet cable, you can avoid latency issues and enjoy a seamless online experience, particularly when engaging in activities that demand a high-speed internet connection such as online gaming or video streaming.

Adblocker and Speed Optimisation

Ads can indeed have a significant impact on your browsing experience, particularly if they are laden with videos or animations. These elements can slow down page loading times and hinder your overall internet experience. Installing an ad blocker on your web browser is a practical solution to combat this issue effectively. By doing so, you can streamline your online activities, enhance page loading speeds, and enjoy a smoother browsing experience. Ad blockers work by preventing ads from displaying on websites, thus reducing distractions and improving the performance of your web browser. This not only saves bandwidth but also protects your privacy by limiting the tracking capabilities of certain advertisements. With an ad blocker in place, you can navigate the web more efficiently and focus on the content that matters most to you.

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Access Points and Wireless Devices

When it comes to troubleshooting slow broadband speeds, considering access points and wireless devices is crucial. Access points can help extend your Wi-Fi coverage and improve connectivity in areas where the signal is weak. Adding more access points strategically around your home or office can enhance network performance and eliminate dead zones.

Additionally, optimising the placement of wireless devices such as smartphones, tablets, and smart TVs can impact your overall internet speed. Avoiding physical obstructions like walls and metal objects between your device and the router can lead to a stronger and more stable connection. Positioning your devices closer to the router can also improve signal strength

Access Points and Wireless Devices

Frequently Asked Questions

How can I check my broadband speed?

You can check your broadband speed using online speed testing tools like or For the most accurate results, connect your device directly to your modem or router using an Ethernet cable, close any unnecessary applications, and run the test multiple times to get an average speed.

What is a good broadband speed?

A good broadband speed depends on your specific needs and online activities. As a general guideline, a download speed of 25 Mbps or higher is considered good for streaming HD video, online gaming, and browsing. However, for households with multiple users or more demanding activities, such as 4K streaming or large file downloads, speeds of 100 Mbps or higher may be necessary. When troubleshooting slow broadband speeds, it's important to consider any data cap restrictions that may be affecting your internet connection speed. Some ISPs may throttle your speeds if you hit your data cap, so it's important to monitor your usage and consider upgrading to a plan with higher data limits if necessary.

Why is my broadband speed slower than advertised?

Your actual broadband speed may be slower than advertised due to various factors, such as network congestion, signal interference, outdated hardware, or distance from your ISP's exchange. Advertised speeds are often based on ideal conditions and may not reflect real-world performance. If you consistently experience speeds significantly lower than advertised, you may not be getting as much bandwidth as you need. In that case, it may be worth upgrading to a faster internet plan to ensure you have enough bandwidth for your needs. If you're unsure about how much bandwidth you need, consider choosing a plan that offers more than you think you'll need to account for potential network slowdowns. If you're still experiencing slow speeds, contact your ISP to investigate the issue.

Can I improve my broadband speed without upgrading my plan?

Yes, there are several ways to improve your broadband speed without upgrading your plan. These include optimising your Wi-Fi network, minimising signal interference, updating your router's firmware, scanning for malware, and optimising your browser settings. However, if you've exhausted these options and are still experiencing slow speeds, upgrading your plan or switching to a faster provider may be necessary. Another easy way to potentially improve your broadband speed is by restarting your router or modem. This simple method can help refresh your connection and improve speeds.

How often should I troubleshoot my broadband speed?

It's a good idea to troubleshoot your broadband speed whenever you notice a significant decrease in performance or if your speed consistently falls below your ISP's advertised speeds. Regular speed tests and proactive troubleshooting can help you identify and resolve issues before they become major problems. As a general rule, aim to troubleshoot your broadband speed at least once every few months or whenever you experience persistent slowdowns. Don't forget to run an internet speed test before and after making any changes to your connection to see if they have improved your internet speed.

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