What Are The Most Common Computer Issues We Face As Technicians?

What Are The Most Common Computer Issues We Face As Technicians

User  Case

We had a user casually ask us during an appointment this question: “So guys, what are the common issues you guys as Computer Technicians face?” Though we didn’t pull up the entire list during our short conversation, thought it was best to bring out our list on a post!

Hardware failures are among the most frequent computer issues experienced by us technicians. These can range from a faulty power supply causing random shutdowns or system freezes due to overheating components, to memory failure leading to data loss or corrupted files.

#1 Slow PCs

Slow PCs can be a source of frustration and are pretty much most of our callouts!

Yup, that’s right – 90% of our appointments.

Some tips:

If your system is running slow, the Performance tab on Task Manager will show you what’s causing the lag.

We check memory-related issues can often be resolved by closing any unused programs or tabs. We consider upgrading RAM, getting a new SSD or partitioning your storage – all good long-term solutions for speed problems.

Glitches in programs and applications may also cause lags – we update or reinstall them.

#2 Hard drive failures

Next would be hard drive failures – anything from old HDDs to SSDs – we get many calls regarding them.

Some tips:

If you’re hearing strange whirring or clicking noises, experiencing overheating, freezing or stuttering, or seeing files and folders disappear, your hard drive may be failing.

Common signs include overheating of the machine, freezing/stuttering during operation, poor performance compared to usual standards, disappearing files or folders, and inaccessibility of data stored on the device.

Other warning signs include apps running erratically and boot-up failures.

So act quickly by seeking professional assistance before more serious damage is done.

#3 Virus removals

Number 3 on the list is virus attacks!

Some tips:

Protect yourself from viruses by installing strong antivirus software that regularly scans your files and devices.

Keeping your systems up-to-date helps ensure the latest security patches are in place; this will help protect against new threats as they arise. Avoiding suspicious downloads or links can reduce the risk of infection due to human error.

If a virus does manage to penetrate your system, it’s important to have an emergency response plan in place so you know how best to respond quickly and effectively.

Keeping backups of all your data is essential too; if you ever get hit with a virus, having clean copies will make it easier for you to restore everything to normal without losing anything permanently.

#4 Overheating

Next would be overheating issues!

Some tips:

Overheating can be caused by several issues, such as blocked vents, a malfunctioning fan, heavy programs running simultaneously, or dust that has settled inside the computer.

First, we check the vents to make sure nothing is blocking them. If something is in the way, we remove it and then turn on your machine to listen for the fans; they should hum when you power up. 

Additionally,we close any heavy programs that are running to lighten the load on your system and prevent it from overheating again down the line.

#5 Data losses

Next on the list is data recovery!

Some tips:

Regularly backing up your data is essential to avoid potential losses.

Data loss can occur due to a variety of reasons, from human error to theft and hard drive failure. 

#6 Power issues

Next: Issues with the power – computer/laptop not turning on etc.

Power outages and other power-related issues can be among the toughest to tackle as a technician and possibly the hardest to diagnose onsite.

Some tips:

First, we make sure the computer is plugged in and getting power from an outlet or surge protector. If that doesn’t solve the issue, we inspect all your cables for any signs of wear or damage. We check your computer’s power settings in the BIOS menu.

If you’re still having trouble starting up, consider resetting the BIOS settings to default as this may help resolve some issues with starting up your laptop or desktop PC.

#7 Restarts and shutdowns

Next: Computers on a restart loop – yup, we get loads of these!

Some tips:

The most common cause of these events is a system update requiring a reboot, so start by waiting a few moments to see if the system turns back on.

If this does not resolve the issue, check for any recently installed applications that could be causing conflicts or malware. Uninstall any suspicious programs.

Ensure that you have all necessary updates installed promptly.

Another way to reduce the chances of unexpected shutdowns is to make sure your PC isn’t overheating.

Keep it in an area with good ventilation and regularly clean out dust from cooling fans and vents.

#8 Peripheral issues

Common problems include malfunctioning peripherals such as monitors, mice, keyboards, and other devices.

The best way we start addressing these issues is by checking the connecting cables and replacing or recharging any batteries in wireless devices.

We also important to check your Device Manager for driver issues that could be causing the problem.

We’ll try updating or reinstalling drivers which may solve the issue.

#9 Motherboard issues

We ensure that your video card is pushed down firmly into its slot and there are no bent pins.

We verify that power cables are plugged in securely both for the video card and the motherboard.

We check if your RAM should be snugly in their slots with wings tightly over each side.

We check if processors are lined up correctly with the motherboard.

When in doubt, leave repairs to professionals!

#10 OS / Software issues

Next is Windows / Mac OS issues

Software malfunctions are often tricky to solve on your own. Operating system (OS) errors can range from minor glitches to serious crashes, including the dreaded Blue Screen of Death.

If automatic solutions don’t work, you should try resetting your OS to a previous version. Reinstalling or changing operating systems may be necessary if the problem persists.

We first run antivirus scans and back up important files on external drives or cloud storage services. A good rule of thumb is to make sure that all software is up-to-date with the latest patches and security updates.

We check if any new devices are connected to your computer, as they may conflict with existing programs or settings in unexpected ways. 

#11 Bluescreen issues

BlueScreenView is an essential tool that enables us to identify and resolve the source of the problem. The utility displays pertinent information regarding the recent BSOD that can help you narrow down the cause.

Generally, this type of error occurs due to hardware issues; however, software problems may also be at fault.

Having access to this data is key in determining what steps we need to take. 

#12 Internet connectivity issues

We start by navigating to the Network tab on your computer’s control panel and running diagnostics or troubleshooting tools.

We contact your internet service provider to check if the network is up.

We also try changing the placement of your computer and removing obstructions that can affect connectivity and speed.


I am a computer engineer holding a bachelor's degree in Computer Science, complemented by a Master's in Business Administration from University of Strathclyde, Scotland. I currently work as a Senior IT Consultant in Melbourne, Australia. With over 15 years of...