PC Troubleshooting 101: Guide to Fix Common Errors Easily

Using a computer is part of daily life. Whether you’re studying, working, or simply browsing the internet, you rely on your PC to run smoothly.

But even the best computers face occasional problems—freezing, random restarts, and annoying error messages. If you’re new to troubleshooting, these issues can feel overwhelming.

The good news? Most computer problems are easier to fix than you think. With some simple steps and the right mindset, you can often solve them yourself—without paying for expensive repairs.

In this guide, we’ll break down the most common computer errors and how to fix them in clear, beginner-friendly language.

⚠️ 1. Slow Performance

Problem:
Your PC is much slower than before. Apps take longer to open, and multitasking feels impossible.

Why It Happens:
✅ Too many programs running at startup
✅ A nearly full hard drive
✅ Background processes consuming resources
✅ Viruses or malware infections
✅ Old hardware struggling to keep up

Solutions You Can Try:
1️⃣ Disable Startup Programs:

Press Ctrl + Shift + Esc to open Task Manager.
Click the Startup tab.
Disable unnecessary apps you don’t use daily.

2️⃣ Clean Up Disk Space:

Type “Disk Cleanup” in the Start menu and run it.
Delete temporary files, system cache, and old downloads.

3️⃣ Scan for Malware:

Use Windows Defender or another trusted antivirus tool.
Remove detected threats.

4️⃣ Consider an Upgrade:

Replacing an old HDD with an SSD can dramatically improve speed.
Adding extra RAM also helps with multitasking.

Pro Tip:
Schedule disk cleanup and antivirus scans once a month.

???? 2. Frequent Freezing or Crashing

Problem:
Your PC freezes randomly or restarts without warning.

Common Causes:
✅ Overheating due to dust or poor airflow
✅ Faulty RAM or storage
✅ Corrupt drivers
✅ Outdated BIOS or firmware

How to Fix It:
✅ Check for Overheating:

Make sure vents are clear of dust.
Use compressed air to clean fans.
Avoid placing your laptop on soft surfaces.

✅ Update Drivers:

Type “Device Manager” in the Start menu.
Right-click each key component (display adapter, network adapter, etc.) and choose “Update driver.”

✅ Check RAM:

Open Windows Memory Diagnostic (search for “memory diagnostic”).
Restart and let it scan for errors.

✅ Update BIOS:

Visit your motherboard manufacturer’s website for instructions.

???? 3. No Internet Connection

Problem:
Your PC won’t connect to Wi-Fi or Ethernet.

Possible Reasons:
✅ Router issues
✅ Network adapter disabled
✅ Wrong network settings
✅ Outdated or missing drivers

Quick Fixes:
✅ Restart your router and modem.
✅ Right-click the network icon > Troubleshoot problems.
✅ Go to Network and Sharing Center > Change adapter settings. Make sure the adapter is enabled.
✅ Update the network driver through Device Manager.

Extra Tip:
If your router has a reset button, hold it for 10 seconds to refresh connections.

???? 4. No Sound

Problem:
No audio comes through your speakers or headphones.

Check This First:
✅ Is your PC muted or volume too low?
✅ Are the speakers plugged in and powered on?

Solutions:
✅ Right-click the speaker icon and open Volume Mixer to check individual app volume.
✅ In Device Manager, update or reinstall audio drivers.
✅ Try a different set of headphones or speakers to rule out hardware issues.

???? 5. Blue Screen of Death (BSOD)

Problem:
Your screen turns blue with an error code, and the system reboots.

Causes:
✅ Hardware failure
✅ Corrupt Windows system files
✅ Driver conflicts or faulty updates

What You Can Do:
✅ Take Note of the Error Code—It helps diagnose the problem.
✅ Boot into Safe Mode and uninstall recently added drivers or updates.
✅ Open Command Prompt as Admin and run:

✅ Use System Restore to roll back to a stable point.

???? 6. Virus or Malware Infection

Problem:
Pop-ups, unusual slowdowns, or programs opening on their own.

What to Do:
✅ Run a full scan with your antivirus software.
✅ Download and run Malwarebytes for deeper cleaning.
✅ Remove any suspicious browser extensions.
✅ Change passwords for your accounts, just in case.

???? 7. Overheating

Problem:
Your laptop feels extremely hot, and fans are loud.

How to Solve It:
✅ Place the laptop on a hard, flat surface.
✅ Use a cooling pad.
✅ Clean dust from vents and fans.
✅ Close unnecessary background apps.

Why It Matters:
Overheating can damage your motherboard, battery, and CPU.

???? 8. Applications Not Responding

Problem:
Programs freeze and say “Not Responding.”

Fix It Like This:
✅ Press Ctrl + Shift + Esc > Task Manager > End Task.
✅ Restart your PC to clear memory.
✅ Make sure the software is updated to the latest version.
✅ Check for Windows Updates.

???? Pro Tip: Use Built-In Troubleshooters

Windows 10 and 11 have many built-in troubleshooters.
✅ Go to Settings > Update & Security > Troubleshoot.
✅ Choose the issue you want to fix—Internet, audio, blue screen, etc.
✅ Follow the guided steps.

⭐ A2Z Computech—Your Trusted Solution Partner

Sometimes, a problem keeps coming back, or you just don’t want to risk making it worse. That’s when A2Z Computech can step in to help.

A2Z Computech offers:
✅ Complete hardware diagnostics
✅ Virus and malware removal
✅ Professional upgrades (SSD, RAM)
✅ Software installation and optimization
✅ Reliable advice for beginners

Whether it’s a slow PC or a major error, you can trust A2Z Computech to get it fixed quickly and affordably.

???? Quick Recap – Common Errors & Fixes

✅ Slow Performance: Clean up, disable startup apps, upgrade hardware
✅ Freezing: Check for overheating, update drivers
✅ No Internet: Restart router, update drivers
✅ No Sound: Check connections, reinstall drivers
✅ BSOD: Safe Mode, system restore, sfc scan
✅ Malware: Full scan, Malwarebytes cleanup
✅ Overheating: Cooling pad, clean vents
✅ Apps Hanging: Update software, clear storage