It’s a common scenario: your computer slows down, becomes unresponsiveness, takes forever to load and makes the simplest tasks frustrating. That’s when you ask yourself — how can I fix a slow computer?

Understanding and fixing a slow computer can seem like a daunting task, but thankfully, it’s not! This guide will show you how to make your computer faster in seven simple steps, so let’s jump straight in!

Looking to speed up your laptop instead? Check out our complete guide on How to make your laptop run faster

Why is my computer so slow?

If you’re wondering why your PC is lagging, it’s probably because you have too many programs running for your system’s capabilities. Powering several programs at the same time takes a lot of processing power, impacting performance and speed. There are two ways to fix this: one, decrease the number of programs running, and two, increase your computer’s memory and processing power.

Whether you need to disable some startup programs, defrag your hard drive or upgrade your hardware, this article will help answer the question, “Why is my PC so slow,” and teach you how to fix it.

1. Restart your PC

It might sound obvious, but many of us don’t restart or shut down our computers as often as we used to. Modern computers and operating systems are good at sleeping, or hibernating, ready to wake up instantly when we want to use them again, but this means that system memory may not be getting cleaned up as often as it needs.

Over time, parts of the operating system can grow less efficient as bits of programs are still floating about in memory. A full hard reset of your computer can clean out this junk, making sure you’re only running essential applications.

2. Identify programs that slow down your computer

One way to fix a slow computer is by decreasing the number of programs running. There may be programs that are using a lot of processing power that you don’t even need. Keep reading to learn how to identify these programs and stop them from running.

How to find out which programs are slowing down your PC

Your computer might be getting bombarded by high-level apps that start automatically and run in the background, or maybe by a program you opened and then forgot to close.

Closing, or even removing unnecessary programs, can instantly speed up a slow computer.

To do this, simultaneously press Ctrl, Alt and Delete on your keyboard, and select Task Manager. On the Processes tab, you'll see which programs are open, and how much CPU and memory they’re using. You can then close any programs you're not using.

Windows task manager image

If there are programs you rarely use or no longer need that are using a lot of CPU or memory, you might want to consider uninstalling them.

How to disable start-up programs

Some computer programs automatically open when you start up your device. Disabling these startup programs is another way to speed up your computer.

Go back into Task Manager, and the Startup tab will show you any programs set to open when you start your computer. Consider what you really need to open automatically, then turn off the other programs using the Disable button in the bottom corner.

3. Check your web browser and add-ons

If your computer's running slowly while you surf the internet, you should make sure you're running the latest version of your web browser. If there’s an option to install new versions automatically, then enable it.

Another browser hack is to avoid having unnecessary add-ons and extensions. Depending on your browser, you should be able to find a menu called Add-ons or Extensions to view and delete any you no longer use.

4. Defragment your hard disk drive (HDD)

HDDs save data in small groups across the disk. Over time, different pieces of related data end up spread all over the place. It then takes longer for the system to find each piece of data and bring it back together when you open a program or app.

Defragmenting (or defragging) your HDD will bring related bits of data back together which speeds up your system.

Note: SSDs do not need to be defragmented since their technology is entirely different than HDDs.

To defrag your HDD, click on the Start menu or Windows button, select Control Panel, then System and Security. Under Administrative Tools, click on Defragment your Hard Drive.

Windows defrag hard drive image

You can choose for the process to run on a regular schedule, or you can click Analyze Disk to determine if the process needs to be run immediately.

5. Identify hardware limiting your computer's speed

Identifying and replacing outdated hardware can make an older computer feel brand new! An upgrade can also be significantly less expensive than buying a new computer.Your storage drive and memory (RAM) are the two key pieces of hardware most related to the speed of your computer. A dated storage drive will slow down your performance, even when defragmented, while too little memory offers limited resources to run multiple programs. Before upgrading your memory, it’s important to take a look at what RAM is compatible with your computer.

6. Upgrade storage with an SSD

The critical difference between a traditional HDD and an SSD is the technology behind it.

An HDD has moving parts, which mechanically move an actuator arm across a spinning platter to find each data portion. In contrast, an SSD accesses data near instantly using flash memory chips, retrieving things like documents, images and videos more quickly while using less power.

There are several varieties of SSDs you can explore to boost a slower PC. Crucial offers both internal NVMe SSDs and SATA SSDs. You'll need to consider a variety of factors such as compatibility, system requirements and budget before deciding which SSD is right for your system.

External SSDs offer many of the benefits of internal SSDs without the need to swap out the drive inside your computer. They can also be used with multiple systems and devices via an external USB cable.

Use the Crucial Upgrade Selector or System Scanner to find the right SSD to speed up your system.

7. Add more memory

Unlike the long-term storage of your SSD or hard drive, RAM acts as short-term storage, temporarily holding current data so that it can be quickly accessed.

Think of it as a desk where you have laid out the files, notes and tools that you are using right now.

Every time you do one of the following things, you're using RAM:

  • Moving your mouse
  • Opening and switching between internet browser tabs
  • Typing an email
  • Creating a spreadsheet
  • Editing photos or videos
  • Playing a game, listening to music or watching a video

The more RAM you have, the more of these tasks your computer can handle at once. Adding more memory is a straightforward way to fix recurring slowdowns.

Upgrading your memory may sound intimidating, but it's easy. With a screwdriver, your owner's manual and our how-to-install RAM guide, you’ll have new memory in your computer within a few minutes — no computer tech or prior knowledge required!

The bottom line: What to do if you have a slow computer

You don't have to make monumental changes to fix a slow computer.

With a few small, manageable changes, you’ll see immediate and lasting results.

These changes and upgrades will make your PC faster, ultimately saving you time, stress and money!

FAQs

  • Will updating my operating system or drivers improve my PC’s speed?

    Yes, updating your operating system and drivers can improve your PC’s speed. Updates often include performance enhancements, bug fixes, and security patches that can help your system run more efficiently. Outdated drivers, especially for critical components like the graphics card or network adapter, can cause slowdowns and compatibility issues. Keeping your system up to date ensures that you have the latest optimizations and improvements from the developers.

  • Could malware or viruses be causing my PC to run slowly?

    Absolutely, malware or viruses can significantly slow down your PC. Malicious software can consume system resources, run unwanted background processes, and even damage files, all of which can degrade performance. Running regular antivirus scans and keeping your security software up to date can help detect and remove these threats, thereby improving your PC’s speed and overall health.

  • Is my PC overheating and causing it to slow down?

    Yes, overheating can cause your PC to slow down. When a PC gets too hot, it may throttle the performance of the CPU and GPU to reduce heat generation, leading to slower speeds. Ensuring proper ventilation, cleaning dust from fans and heat sinks, and possibly upgrading your cooling system can help maintain optimal temperatures and prevent thermal throttling.

  • Will cleaning dust out of my PC improve its speed?

    Cleaning dust out of your PC can indeed improve its speed. Dust buildup can obstruct airflow, causing components to overheat and throttle performance. Regularly cleaning the interior of your PC, especially around fans and heat sinks, can help maintain proper cooling and ensure that your hardware operates at peak efficiency. This simple maintenance step can prevent overheating and related slowdowns.

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