Fixing common problems yourself.
Most computer and phone problems can be fixed in minutes without paying a repair shop. In this final lesson you'll learn a simple troubleshooting method and fixes for the most common problems. Then the final test.
The troubleshooting method
- What exactly is wrong? Write the error message or describe the symptom.
- What changed recently? A new app, update, cable, or a fall?
- Try the simple fixes first: restart, check cables/connections, check updates.
- Search the exact error message online (with your device model).
- Change one thing at a time and test.
- Back up important files before major fixes.
"Have you tried turning it off and on again?" is a joke in IT offices because it genuinely fixes a huge number of problems. Restart first.
Common problems and fixes
| Problem | Try this |
|---|---|
| Laptop is very slow | Restart; close unused apps and tabs; check storage (free up space); check Task Manager (Ctrl + Shift + Esc) for apps using high CPU/memory |
| Wi-Fi connected but no internet | Restart the router; forget and reconnect to the network; check if other devices work |
| Printer not printing | Check paper and power; restart printer and laptop; check it's the default printer; reinstall the driver from the official site |
| Phone storage full | Delete WhatsApp media you don't need (Settings → Storage), clear app caches, back up photos to the cloud then remove local copies |
| Phone battery drains fast | Lower brightness, check Battery settings for apps using the most power, update apps, remove unused apps |
| No sound | Check volume and mute; check the correct output device; reconnect headphones/Bluetooth |
| An app keeps crashing | Update it; clear its cache; restart the phone; reinstall |
| Forgot a password | Use "Forgot password" on the official site/app only; then save it in a password manager |
When to get professional help
- Physical damage: broken screen, water damage, burning smell, swollen battery (stop using it immediately).
- Data recovery from a failed drive.
- Repeated problems after trying the basics.
Use authorised service centres for warranty devices, and remove or back up personal data before giving a device for repair.
Your laptop suddenly became slow yesterday after installing a "free video downloader". What's the best first step?
Something changed recently; undo it first and check for malware.
Final test
Which of these is hardware?
You can physically touch an SSD.
The best way to name a CV file is…
Clear, professional and the right format.
Which email field hides recipients from each other?
Blind copy.
Which Excel function decides between two results?
IF tests a condition.
Windows + L…
Always lock when you step away.
The first troubleshooting step for most problems is…
Start simple.
Final task
Do a "digital health check" of your devices: update everything, free up storage, organise your files, check cloud backup, turn on 2-step verification for your email, and lock your screen with a strong PIN. Share your progress in Shia Circle c/Progress.
Course complete!
You've completed Tech Foundations: how computers work, the internet, email, cloud, Docs, Sheets, typing and troubleshooting. Next, try the Cybersecurity or AI course to go further!
Back to the course →