How to Troubleshoot Basic Computer Problems to Fix Your Computer

How to Troubleshoot Computer Problems header

A big reason that discourages some people from trying to become familiar with computers and other digital technology devices is that they seem far too complex to understand. While that can be true in some respects, in a lot of other ways, it’s not. In fact, most consumer-grade digital technology is being made more accessible and intuitive all the time.


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Part of that is making computers easier to fix when something doesn’t work correctly. And even computer troubleshooting isn’t always as difficult as you might think. To demonstrate, this article will give you some simple tips and techniques for how to fix a computer. Here’s a quick rundown of our agenda:

Stick with us, and soon you’ll be a basic computer troubleshooting whiz!

What is troubleshooting?

“Troubleshooting” usually describes the act of fixing problems that cause machines (especially computers) to stop working, work sub-optimally, or otherwise do something irregular. Specifically, though, it actually refers to a particular problem-solving system that works through several steps.

A basic representation of the troubleshooting process looks something like this:

  1. Identify the specific problem – Determine exactly what it is your computer is not doing that you want it to do, or doing that you don’t want it to do.
  2. Consider relations to similar scenarios – Think about problems that you may have had with your computer before that were like your current one. Recall how those problems were solved, and consider what was the same or different in those instances.
  3. Hypothesize and treat common causes – Brainstorm some simple things that could make your computer not act in the particular way you want it to. Check and fix these things, and then see if that stops the problem and keeps it from coming back soon afterward. If it does, you’re done! If not, proceed to step 4.
  4. Test relevant components – If none of the common solutions work, methodically check parts (all of them, if you have to) of each system on your computer that could be responsible for the problem.
  5. Implement a solution on the problem component – If you think you’ve narrowed down what part of your computer is causing your issue, come up with a strategy for how to fix it, and then test it out.
  6. Verify that the issue is resolved – After working on the allegedly faulty computer component, if the problem is gone and doesn’t quickly start reoccurring (and, therefore, your computer is working normally again), you’re done! If not, go back to step 4.

Now that you know what the troubleshooting process is and how it works, let’s see it in action! Here are some common computer maladies and how to work through them.

10 common computer problems and how to troubleshoot them

1. My computer runs slowly.

Waiting on a slow computer

General description:

Your computer takes a long time to boot up, programs take a long time to open, and both system and application functions take longer than usual to respond to your inputs.

Common causes:

  • You have too many windows open at once, or too many programs running at once.
  • Your computer’s registry is fragmented or corrupted.
  • Your computer has installed a virus or other malware program.
  • Your computer doesn’t have enough RAM to run all the programs you want it to.

Troubleshooting suggestions:

2. I’m stuck on the “Blue Screen of Death.”

A "STOP" error, or the Blue Screen of Death

General description:

This is more officially known as a “STOP error,” and it shows up when your computer’s operating system determines that it can’t run your computer safely at the moment. It has various causes, some of which are more serious than others. Be sure to read the specific error message for hints on what went wrong.

Common causes:

  • A piece of hardware on your computer is malfunctioning or is not compatible.
  • The software controlling a piece of hardware (i.e. “driver” or “firmware”) is out of date.
  • Your main hard disk doesn’t have enough free memory space available on it.
  • Your computer has installed a virus or other malware program.
  • Your BIOS or other hardware settings are misconfigured.

Troubleshooting suggestions:

  • Use System Restore to revert your computer to a state where it was working.
  • Go to your Control Panel and uninstall old programs that you don’t use anymore.
  • Install and run an antivirus program to repair infected files.
  • Install updates for your operating system, device drivers, BIOS, and other programs.
  • Change the settings for your BIOS and hardware back to their defaults.
  • Make sure all hardware components of your computer are properly installed.
  • Test your computer’s hardware for failures (likely RAM or hard disk), and replace if necessary.

3. My computer won’t turn on.

Female businessperson frustrated that her computer won't turn on

General description:

You press the power button and your computer won’t turn on, or it powers up and then promptly shuts down. The good news (if you can call it that) is that this is almost always a hardware problem, so you can usually immediately rule out any software-related culprits.

Common causes:

  • One or more power switches to your computer system aren’t turned on.
  • Your computer’s power supply or power cord is missing, unplugged, or faulty.
  • One or more of your computer’s hardware components are improperly connected or faulty.
  • Your computer’s CMOS battery is out of power.
  • The power button itself isn’t working.

Troubleshooting suggestions:

  • Make sure each switch leading to your computer’s power supply is on.
  • Make sure all power cables on your computer are connected and set to the correct voltage.
  • Remove all intermediary power sources and plug your computer directly into an outlet.
  • Disconnect all peripheral devices (mouse, keyboard, etc.) before trying to start your computer.
  • Open your computer case and make sure all hardware components are properly connected.
  • Replace your CMOS battery.
  • Replace your hard drive or motherboard.

4. My computer continually or randomly restarts or shuts down, especially while it’s booting.

Computer needing to restart

General description:

Your computer randomly restarts or shuts down on you while you’re using it. Or, shortly after booting up, your computer crashes and shuts down or forces you to restart it. Like the “Blue Screen of Death” (which is sometimes associated with this problem), this can be caused by a few different things, and some of them require more work to fix than others.

Common causes:

  • Your operating system is missing a key update.
  • One or more of your computer’s device driver programs are out of date.
  • Your computer has installed a virus or other malware program.
  • Your computer’s motherboard, RAM, and/or hard disk are damaged.

How to troubleshoot it:

  • Make sure you have installed all recommended update packages for your operating system.
  • Make sure the device drivers for your computer’s hardware components are all up-to-date.
  • Install, update, and run an antivirus program to repair infected files.
  • Take out a RAM module and start your computer. If it doesn’t work, put it back and try another.
  • Replace your hard drive and/or RAM modules, with an experienced repair person if necessary.

5. Parts of my computer are beeping or making strange noises.

A computer beeping as it experiences an error

General description:

You should hear minimal noise coming from your computer if it’s running optimally. But if the hard drive starts beeping, or other hardware parts start making more noise than usual, it could be a sign of a problem with your computer.

Common causes:

  • A CD/DVD-ROM or external disk drive may be trying to access files (most of which is normal).
  • One or more of your computer’s cooling fans are broken or working sub-optimally.
  • A RAM module or other piece of hardware is malfunctioning or is incorrectly installed.
  • The hard drive is close to failing.
  • The motherboard has detected some other manner of problem.

How to troubleshoot it:

  • Remove any disks from your CD/DVD-ROM drive and disconnect any external disk drives.
  • Clean your computer fans with something, like a compressed air can, or repair or replace them.
  • Check the BIOS settings to make sure they’re running the fans correctly.
  • Remove all RAM modules and then properly re-insert them.
  • Remove any newly-installed hardware components and re-insert, repair, or replace them.
  • Back up the files on your hard drive and then get it replaced.

6. My computer is overheating.

A computer's CPU overheating until it's on fire

General description:

Parts of your computer feel abnormally hot when you touch them or put your extremities near them. This is usually a problem with your computer’s fans or other cooling systems, but that may have indirect causes as well, such as putting a bigger data load on your computer than it can handle.

Common causes:

  • The airflow through your computer’s case is restricted or blocked.
  • You have too many windows open at once, or too many programs running at once.
  • Your BIOS settings are running your computer faster than it can handle (“overclocking”).
  • One or more of your computer’s cooling fans are broken or working sub-optimally.
  • Your computer doesn’t have enough RAM to run all the programs you want it to.

How to troubleshoot it:

  • Close any windows and quit any programs that you aren’t immediately using.
  • Open your Task Manager and stop programs or processes that don’t need to be running.
  • Adjust the BIOS settings to run the fans correctly and not run your CPU faster than it can handle.
  • Make sure the vents to and from your computer’s fans aren’t blocked.
  • Install and use a program that can control the speed of your computer’s fans.
  • Clean your computer fans with something, like a compressed air can, or repair or replace them.

7. My computer’s peripheral devices, like the mouse and keyboard, aren’t working.

Broken computer keyboard and mouse with screwdrivers

General description:

Extra hardware devices that you attach to your computer – like a keyboard, mouse, or external disk drive ­– aren’t working or are acting differently than they normally do. This is mainly a connection or driver issue, but it may be something else.

Common causes:

  • One or more of your computer’s device driver programs are out of date.
  • One or more of your computer’s connection ports aren’t working properly.
  • Settings on your computer regarding the device have been improperly configured.
  • The component itself isn’t working due to being damaged or dirty.

How to troubleshoot it:

  • Make sure the device drivers for your computer’s hardware components are all up-to-date.
  • Unplug the faulty device from your computer, then plug it back in (to another port, if you can).
  • Go to your Control Panel and change your settings (start with “Ease of Access”).
  • Clean the faulty device (taking it apart if you need to), or get it repaired or replaced.

8. My computer suddenly freezes while I’m using it.

Male businessman's computer repeatedly freezing

General description:

You’re using your computer normally, when all of a sudden, the screen stops moving and your input devices don’t respond. It happens to most of us every once in a while, but if it happens repeatedly, you may have a bigger problem on your hands.

Common causes:

  • A software program on your computer has experienced an error.
  • One or more of your computer’s processes is taking up too much memory and CPU power.
  • Your computer has installed a virus or other malware program.

How to troubleshoot it:

  • Open your Task Manager and stop programs that aren’t responding.
  • Open your Task Manager and stop processes that are taking up a lot of memory or CPU power.
  • Install, update, and run an antivirus program to repair infected files.

9. I think my computer has installed a virus or other form of malware.

Concept of a virus or malware computer program

General description:

As we’ve discussed, a virus or malware program can be responsible for all sorts of nasty things that happen to your computer: it slows down, unwantedly runs or changes programs, sporadically restarts or shuts down, repeatedly crashes, and more. Fortunately, its possible causes are relatively limited, and there’s quite a bit that you can do about one.

Common causes:

  • You opened or downloaded a file that contained a malware program.
  • You connected a device to your computer whose files were infected with malware.
  • You visited a website that was infected with malware.

How to troubleshoot it:

10. My computer can’t maintain a connection to the Internet.

Internet connection to man's tablet interrupted

General description:

You can’t use a web browser or other Internet-related service because you can’t connect to the Internet. Or, while you’re using the Internet, you get an error message because your computer has disconnected.

Common causes:

  • Your Internet router may not be plugged in or working properly.
  • There may be too much distance or interference between your computer and your router.
  • The driver for your computer’s network card may be out of date.
  • Your computer’s network card may not be receiving the power it needs.

How to troubleshoot it:

  • Make sure your Internet router is plugged in and working. If not, repair or replace it.
  • Move your computer closer to your router, and/or move obstacles out of the way.
  • Update the driver program for your computer’s network card.
  • Go to “Wireless Adapter Settings” in “Power Options” and set to “Maximum Performance.”
  • Call your Internet Service Provider and inquire about the problem.

If you’re not quite sure what the problem is, or none of those solutions worked for you, our tips below might help you get your computer up and running again.

7 general tips for troubleshooting computer problems

1. Turn it off, and then turn it on again.

Shutting down and restarting your computer resets programs and processes that may have been experiencing errors or glitches. This will usually solve minor problems quickly and easily.

2. If you don’t know something, ask!

Write down information that you don’t quite understand as it appears while you troubleshoot, like error messages. Then, discuss it with a computer-savvy friend or family member, or look it up online. Chances are good that someone else knows what it means and what to do about it.

3. Start with simple fixes, and then rule out possibilities from there.

Save yourself time, money, and hassle by starting with the easy solutions first, then trying more complicated fixes if those don’t work.

4. Check your device connections.

Something on your computer may not be working simply because it isn’t plugged in properly, or at all. Make sure all parts are secured snugly to each other and that all sockets are working normally.

5. Boot your computer in Safe Mode.

Starting your computer in Safe Mode disables some advanced functions of your computer. If Safe Mode works fine but a normal boot-up doesn’t, you’ll know that your computer has a problem with something like its device drivers, a rogue start-up program, or a faulty peripheral device.

6. Keep your programs up-to-date.

Updating your software can not only potentially fix current computer problems, but it may prevent future ones by fixing glitches and other security vulnerabilities that can be exploited.

7. If all else fails, re-install the operating system.

This will reset everything, including (theoretically) any programs, malware, or faulty settings that were giving your computer trouble. Make sure to back up your data before you do this, though, because you’ll need to load it back onto the system afterwards.


Now you have some basic knowledge for how to fix your computer if something goes wrong with it! For more info on how to make your computer and Internet experiences as smooth as possible, visit our Internet 101 section. Or check out our entire Technology Basics category, which includes the Digital Literacy section with information and tips on mastering all things digital!

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