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by | Nov 2, 2022 | How to


Why is my pc so slow and how to fix it? If you find yourself asking this question a lot, you’ve come to the right place.

A slow computer may make even the simplest chores challenging, whether you want to play a game, finish work, or go shopping. There are many different reasons why your computer may be operating more slowly than you’d want. Don’t sit there thinking “Why is my computer slow?” because this is a fairly common problem, and there are several ways to fix it. Instead, take action.

Why is my PC suddenly so slow?

Before we attempt to speed up your slow PC, let’s go through a few potential causes for its possible sluggishness. A sluggish machine could be plagued by viruses or just require cleaning.

Remember that your operating system connects your machine’s resources and supplies energy to the many programs you use every day. With a PC, there is a tonne of background processes running all the time that can occasionally slow us down. That said, this usually only becomes apparent on a dated or underpowered PC.

main reasons why a computer is slow:

  • old system
  • Entry-level specs
  • an overheated CPU
  • A virus or malware
  • Ram that’s not enough
  • There is not enough room for storage
  • running too many background processes
  • Too many open applications
  • keeping your PC running nonstop

The suggestions listed below can be used by users to help speed up a computer, make it run more quickly, or figure out why a computer is running slowly. Please be aware that this website only addresses generally slow computers; it does not address computers that start slowly or have slow Internet connections.


Before completing any of the instructions below, make sure to reboot your computer if it hasn’t been done recently. Restarting the computer is a simple first step that can solve many issues.

Background Programs

Programs operating in the background are one of the most common causes of a slow computer. TSRs and starting programs that launch automatically each time the computer boots should be removed or disabled.

Open Task Manager to check what programs are now running in the background and how much memory and CPU they are consuming. Run Resmon if you are using Windows 7 or a later version to better understand how your computer’s resources are being used.

Check to see whether your antivirus scanner, spyware protection program or other security tool is not checking your computer in the background. While a scan is running, your computer’s general performance suffers. Allow the scan to finish if this is the case, and the computer’s performance should increase.

Trash temporary files

On the hard disc, temporary files are kept while a computer runs programs. These temporary files can be deleted to enhance computer performance.

Windows systems

First, we advise deleting temporary files and other files from the computer using the Windows Disk Cleanup tool. Unfortunately, not all files in the temp directory may be deleted by the disk cleanup. As a result, we also advise manually removing temporary files.

  • Enter %tmp% in the search field after opening the Start menu or pressing the Windows key. (Note: Enter %tmp% in the Run box on Windows XP and prior by clicking the Run option in the Start menu.) 
  • Once you hit Enter, the Temp folder should open.
  • All of the files located in this folder can be erased, and any that are currently in use and unable to be destroyed can be skipped.

Free hard drive space

Make sure there is 200–500 MB of available space on the hard drive. This available space enables the computer to store temporary files and allows the swap file to increase in size.

fragmented or corrupted hard drive

Look for errors on the hard disc.

Run ScanDisk, chkdsk, or a similar program on a Windows machine to make sure the hard drive isn’t physically broken.

Using Microsoft ScanDisk.

Check the hard disc for faults with the Disk Utility program on a macOS machine by selecting the First Aid option. Activate the Disk Utility by:

  • On the dock, select the Launchpad icon.
  • Open the Other folder, and then.
  • The Disk Utility can be opened by clicking on it.

A fragmented hard drive should not be used.

To help ensure that data is organized in the best way possible, run Defrag.

Hard drive test

Examine the SMART of the drive and use additional software tools to check for any errors on the hard drive.

Run a virus check

Your computer could operate more slowly if it has one or more viruses on it. Run the free online Housecall utility from Trend Micro to scan and remove viruses from your computer if it doesn’t already have an antivirus program installed. To actively defend yourself against viruses, we also advise using an antivirus program.

Run a malware check

Today, malware such as spyware is a major contributor to many issues with computers, including poorer performance. We advise performing a malware scan even if the PC already has an antivirus scanner installed. To check your PC for malware, use Malwarebytes’ free edition.

Hardware issues

Verify that there are no conflicts in the Device Manager. If any problems exist, fix them because they might be the root of your issue.

Update the operating system

Run Windows Update to update a PC running Microsoft Windows. Run Software Update to perform an update on a macOS device. Use the App Store to update the operating system.

Disable browser plug-ins

Consider turning off any browser plug-ins, add-ons, or extensions if your computer is noticeably slow when you use your online browser.

Update your drivers

Make sure your computer hardware is running the most recent drivers, particularly the most recent video drivers. Having outdated drivers can lead to several problems, including weak performance.

Reboot the computer once again

Restart your computer after making any of the above modifications.

Apply a registry cleaner

(Note: This part can skip if you own a Mac computer because there isn’t a registry in macOS.)

Typically, we do not advise using registry cleaners. But if you followed all the recommendations and your computer is still slow, you might need to consider using a registry cleanup.

Upgrade RAM

You might require more RAM if your machine is older than two years. For a 32-bit system, we suggest that PCs have a minimum of 2 GB of memory (RAM), and for a 64-bit system, 4 GB. Your computer doesn’t need to swap information stored in memory to the swap file since it has enough memory for programs to run in memory. If the hard drive light is on all the time, the computer is likely to often transfer data between the hard drive and memory.

Upgrade the hard drive

The hard disc drive is one of a computer’s main bottlenecks. The performance of a computer can be greatly enhanced by switching from a regular hard disc (such as a 5400 RPM model) to a solid-state drive (SSD).

Overheated computer or processor

Examine whether your computer’s processor is overheating. The performance of the pc can suffer from uncontrolled heat since most operating systems automatically limit the processor’s speed to help prevent heat-related problems.

A computer might overheat if the necessary airflow restricts inside by materials like dust, dirt, and hair. Ensure the fans aren’t blocked and that the PC case is spotless.

speed up or upgrade the processor

Your computer’s performance may enhance by speeding up the processor (CPU). Overclocking or upgrading are the two techniques for improving processor speed.

A processor is overclocked when its speed is raised above the level at which it can operate reliably. While overclocking can boost the processor’s speed, the boost is typically not very noticeable, only increasing the speed by a maximum of 10% or 20%. The CPU itself must be able to overclock as well. You would need to locate your computer’s processor’s specifications to find out if it can overclock. Because an overclocked processor produces more heat, so a stronger heat sink and fan are needed to remove the extra heat from the processor.

Erase the computer and start over

Reinstalling the operating system or starting over are other options if none of the above procedures work to solve your problems.

Erasing outdated software or drivers, removing everything on your computer, and reinstalling the operating system can boost performance. A fresh installation of macOS or Windows, software applications, and the most latest drivers can all be installed to ensure your machine isn’t being slowed down by software-related problems.

Hardware problems

Last but not least, if your computer is still slow after trying the above suggestions, there may be a more significant hardware-related problem (e.g., failing component). The motherboard, CPU, RAM, hard drive, and other hardware components are some examples of probable faulty parts.

The Ultimate Boot CD (UBCD) tool uses to perform hardware diagnostic tests. Using this software, you may find out whether your machine has faulty hardware.

Aging System

Your computer will work less actively than a new one if it is older than five years. Newer computers can perform more latest software programs effectively thanks to optimization. Aging Systems operate more slowly because they can’t execute these modern programs as well. Another issue with out-of-date hardware is that modern software generally has higher demands. We suggest you think about getting a latest PC or upgrading your existing one. If you want to make your own latest gaming pc check out our guide on how to build a gaming pc.

Final Thoughts

You don’t need to make any significant adjustments to speed up a slow computer. You’ll experience instant and long-lasting effects with a few simple, manageable changes. It’s not necessarily the end of the world if your computer has suddenly started to run slowly. When your computer is running slowly, you might think it’s the end of the line. However, the solutions mentioned above can help you get more use out of your machine and save money. Upgrades are costly, and with the present stock problems the computer industry is experiencing, it makes sense that some people would want to get the most performance possible from their parts.

Your desktop or laptop may need to be completely reformatted (rebuilt from scratch) or upgraded if the initial methods don’t speed them up. Upgrades are expensive and reformatting is the last resort, but we hope this article might at least temporarily reduce some of the stress.

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The Team That Worked On This Build


For as long as he can remember, The Gaming Guide has always been interested in computers and gaming. It all started with the Sega Mega Drive and then evolved into PC gaming in his early teens. CS 1.6 was his first go at competitive gaming which soon evolved into CS:Source and now CS:GO – a game that he still plays (almost exclusively) today. Throughout that period he has also been a keen PC builder and enthusiast – dedicating a large portion of his time to the craft. My current rig is an ASUS 5700XT with AMD’s Ryzen 3600X.


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