Computers are reliable—until they aren’t. If your PC or laptop is slow, crashing, overheating, or refusing to connect to Wi-Fi, the fix is often simpler than you think.
Here are 10 common computer issues we see all the time, what usually causes them, and what you can do to fix them (without wasting money).
1) Slow computer or laggy performance
Slow performance is usually caused by too many startup apps, low storage, malware, or an old hard drive.
- Restart (sounds basic, but it clears stuck background processes).
- Disable heavy startup apps (Task Manager → Startup on Windows).
- Free up storage (aim for at least 15–20% free space).
- If you’re on an older hard drive, upgrading to an SSD is the biggest speed boost.
2) Blue Screen / crashing / random freezes
Blue screens and freezes often come from bad drivers, failing storage, RAM issues, or corrupted system files.
- Install OS updates and update drivers (especially graphics + chipset).
- Check storage health (failing drives cause crashes).
- If it’s frequent, get a diagnostic before you lose data.
3) Wi-Fi keeps disconnecting or internet is slow
Connectivity issues can be router-related, driver-related, or caused by network settings.
- Restart modem/router (unplug 30 seconds).
- Forget network → reconnect (refreshes saved credentials).
- Update Wi-Fi driver and OS.
- Test on another device to confirm if it’s your computer or the internet service.
4) Malware, popups, redirects, or weird browser behavior
If your browser redirects, you’re seeing popups, or your PC feels “possessed,” malware/adware is likely.
- Run a full scan with reputable protection.
- Remove unknown browser extensions.
- Reset the browser if redirects persist.
If you want a clean breakdown of what to install (and what to avoid), read: Best Antivirus Software in 2026.
5) Apps freezing or “Not Responding”
This can happen from low RAM, a full drive, corrupted app installs, or background overload.
- Force close the app (Task Manager on Windows, Force Quit on Mac).
- Update the app and OS.
- Reinstall the app if it keeps crashing.
- If it happens across many apps, check storage/RAM and scan for malware.
6) Overheating / loud fans / sudden slowdown
Heat causes throttling (your computer slows down to protect itself). Common causes: dust, blocked vents, failing fan, or dried thermal paste.
- Use the laptop on a hard surface (not a bed/couch).
- Clean vents with compressed air.
- Close heavy apps and check CPU usage.
Full step-by-step guide: What to Do If Your Laptop Is Overheating.
7) Storage full / “Low disk space” warnings
When storage is nearly full, everything slows down, updates fail, and apps crash more often.
- Delete large downloads and unused apps.
- Move photos/videos to external drive or cloud.
- Consider upgrading to a larger SSD if you’re always full.
8) File loss or accidental deletion
Data loss happens from accidental deletes, failing drives, corruption, or malware.
- Use cloud backup (OneDrive, iCloud, Google Drive) for important folders.
- Keep an external backup for photos and documents.
- If your drive is clicking/freezing, stop using the computer and get it checked.
9) Printer not printing / won’t connect
Printer issues are usually driver-related, connection-related, or queue-related.
- Power cycle printer and computer.
- Delete stuck print jobs and retry.
- Reinstall printer drivers.
- If Wi-Fi printing fails, try USB once to confirm the printer works.
10) Unexpected shutdowns or reboot loops
Sudden shutdowns are often overheating, power supply issues, failing battery (laptops), or motherboard faults.
- Check temperatures (especially if it shuts down under load).
- Try a different charger/outlet (laptops) or power cable (desktops).
- If it’s repeating, a diagnostic is the fastest answer.
When you should stop troubleshooting and get a diagnostic
- Crashes/blue screens keep coming back
- Overheating leads to shutdowns
- Computer won’t boot or gets stuck in repair loops
- Drive clicking/freezing (possible data loss risk)
- You fixed “symptoms” but the problem returns within days
Need PC or laptop repair in Houston?
If your computer is slow, overheating, crashing, or acting weird, MacNDroid can run diagnostics and fix the root cause (not just the symptoms).
PC & Laptop RepairGet a PriceCall (346) 808-0948
FAQ
Why is my computer slow even after restarting?
Usually startup apps, low storage, malware, or a failing drive. An SSD upgrade is often the biggest improvement.
Is it worth repairing an older computer?
Often yes—especially for SSD/RAM upgrades, overheating fixes, and malware cleanup. If you’re unsure, use this guide: Repair vs Replacement: How to Decide.
What’s the first thing I should do if I think my hard drive is failing?
Back up important files immediately. If the drive is clicking or freezing, stop using it and get a diagnostic.
