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How to Speed Up a Slow Computer: 10 Practical Fixes That Work

Use 10 proven fixes to speed up a slow computer before replacing it. Practical guidance from PC Macgicians for Windows and Mac users.

8 min read By PC Macgicians
IT Tips Computer Maintenance computer-repair performance
Laptop performance and maintenance check

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Table of Contents

Introduction

A slow computer can be incredibly frustrating, especially when you’re trying to get work done or enjoy your favourite activities. Before you consider buying a new computer, there are several simple and effective ways to speed up your existing machine.

In this guide, we’ll walk you through 10 proven methods that our IT experts use to help customers improve their computer’s performance.

Why Computers Slow Down

Computers can slow down for various reasons:

  • Too many startup programs consuming resources
  • Insufficient RAM for your workload
  • Fragmented hard drive or failing storage
  • Malware or viruses running in the background
  • Outdated software or drivers
  • Overheating causing thermal throttling

10 Ways to Speed Up Your Computer

1. Remove Unnecessary Startup Programs

Many programs automatically start when you boot your computer, slowing down the startup process and consuming resources.

How to fix:

  • On Windows: Open Task Manager (Ctrl+Shift+Esc), go to the Startup tab, and disable programs you don’t need
  • On Mac: Go to System Preferences > Users & Groups > Login Items and remove unnecessary items

2. Free Up Disk Space

A nearly full hard drive can significantly slow down your computer.

How to fix:

  • Delete temporary files and old downloads
  • Uninstall programs you no longer use
  • Use built-in disk cleanup tools (Disk Cleanup on Windows, Storage Management on Mac)
  • Move large files to external storage or cloud storage

3. Run Antivirus and Malware Scans

Malware can consume system resources and slow down your computer.

How to fix:

  • Run a full system scan with your antivirus software
  • Use Windows Defender or a reputable third-party antivirus
  • Consider professional virus removal services if you suspect serious infection

4. Update Your Operating System and Drivers

Outdated software can cause performance issues and security vulnerabilities.

How to fix:

  • Install the latest Windows or macOS updates
  • Update device drivers, especially graphics and chipset drivers
  • Enable automatic updates to stay current

5. Add More RAM

Insufficient RAM is one of the most common causes of slow performance.

How to fix:

  • Check your current RAM usage in Task Manager (Windows) or Activity Monitor (Mac)
  • Consider upgrading to 8GB or 16GB of RAM
  • Our RAM upgrade service can help improve performance significantly

6. Upgrade to an SSD

Traditional hard drives are much slower than solid-state drives (SSDs).

How to fix:

  • Replace your hard drive with an SSD for dramatically faster boot times and file access
  • Our SSD upgrade service includes data migration and can breathe new life into older computers

7. Clean Your Computer’s Interior

Dust buildup can cause overheating, which leads to performance throttling.

How to fix:

  • Power down and unplug your computer
  • Use compressed air to remove dust from fans and vents
  • For laptops, consider professional cleaning to avoid damage

8. Disable Visual Effects

Fancy visual effects can slow down older computers.

How to fix:

  • On Windows: Right-click This PC > Properties > Advanced System Settings > Performance Settings > Adjust for best performance
  • On Mac: System Preferences > Accessibility > Display > Reduce motion

9. Close Unnecessary Browser Tabs

Each browser tab consumes memory and CPU resources.

How to fix:

  • Close tabs you’re not actively using
  • Use browser extensions to suspend inactive tabs
  • Consider using a lighter browser if you have many tabs open

10. Perform Regular Maintenance

Regular maintenance prevents problems from building up.

How to fix:

  • Run disk cleanup weekly
  • Defragment your hard drive monthly (if using HDD, not SSD)
  • Schedule regular antivirus scans
  • Consider our PC Health Check service for comprehensive maintenance

When to Call a Professional

If these steps don’t improve your computer’s performance, or if you’re experiencing:

  • Frequent crashes or blue screens
  • Unusual noises from your hard drive
  • Overheating issues
  • Suspected hardware failure

It’s time to contact a professional. Our laptop repair and PC repair services can diagnose and fix more complex issues.

Conclusion

Most slow computers can be significantly improved with these simple steps. Start with the easiest fixes (removing startup programs, freeing disk space) and work your way through the list. If you need professional help, don’t hesitate to contact us for expert IT support in South West London.

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PC Macgicians

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