Guide · Comox Valley
Why is my computer so slow?
Slow to start, a spinning circle, a fan that never stops. Here is what's usually behind it, and what you can try yourself before calling anyone.
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Quick answer: Most slow computers have a simple cause, such as too many programs starting at once, a nearly full drive or waiting updates. Restarting and a few quick checks fix many of them. If it stays slow, unwanted software or a worn-out part may be behind it.
Do it yourself
Things to try yourself
Restart it properly
Choose Restart, not just Shut down, and not just closing the lid. A restart clears out the small problems that build up when a computer runs for days. It sounds too simple, but it helps more often than people expect.
Install waiting updates
Updates fix bugs that can slow a computer down. On Windows, open Settings, then Windows Update (or Update & Security on older versions). On a Mac, open System Settings, then General, then Software Update. Let it finish, then restart.
Check how full the drive is
The drive is where your files are stored, and an almost-full one makes everything slower. On Windows, open File Explorer, then This PC, and look at the bar under your drive. If it's nearly full, move photos and videos to an external drive or an online storage account that you own, and empty the recycle bin. Make sure anything you can't replace is backed up before deleting anything.
Turn off programs you don't need at startup
Some programs start themselves every time the computer turns on and keep running in the background. On Windows, press Ctrl, Shift and Esc together to open Task Manager, then choose Startup apps. Turn off only the ones you recognise and don't need straight away. If you're not sure what something is, leave it on.
Tidy up the web browser
Dozens of open tabs, and add-ons (small extras added to the browser), use a surprising amount of the computer's memory. Close the tabs you aren't using, and remove any add-on you don't remember installing.
Run the built-in security scan
Windows has a free scanner called Windows Security. Open it from the Start menu, choose Virus & threat protection, then Quick scan. If pop-ups or strange toolbars have appeared recently, ask for help rather than installing a "cleaner" program from an advert.
Check whether it's really the computer
If only websites and videos are slow, the problem may be the Wi-Fi, not the computer. Try another device on the same Wi-Fi. If that one is slow too, the Wi-Fi is the place to look.Read: Do I need a mesh Wi-Fi system?
Know when to stop
Signs it's time to get help
- It's still slow after a restart, updates and clearing some space
- Pop-ups or messages you didn't ask for, especially ones claiming your computer has a virus
- The fan runs loudly all the time, or the computer feels hot
- It freezes, restarts by itself or shows a blue screen
- It takes several minutes to start up
- It's an older computer that gets slower each month, which can mean a worn-out part
- You're not sure what's safe to delete or turn off
Need a hand?
Or we can do it for you
Call or text and describe the problem in your own words. Help comes to your home or business in Courtenay and across the Comox Valley, with an estimate before the visit. Most home visits fall between $79.99 and $159.99. For software problems, remote help starts at $44.99 for up to 30 minutes.
Questions
Quick answers
Is it worth repairing an old computer?
Often, yes, when the problem is software, such as too many startup programs or unwanted software. If the computer is very old or a part has worn out, replacing it can make more sense. You'll be told plainly which it is before anything is spent.
Should I download a "PC cleaner" program?
Be careful. Many of these are adverts, and some cause problems of their own. The steps above use what's already built into the computer. If you'd like a second opinion on a program, ask before installing it.
Does a virus make a computer slow?
It can. Unwanted software running in the background uses up the computer's power. Pop-ups, new toolbars and a changed home page are common signs. If you see them, stop and get help rather than clicking around.
Can a slow computer be fixed without a visit?
Often, for software problems. Remote help starts at $44.99 for up to 30 minutes. If it turns out to need hands on the computer, a home visit is the next step.
- Updated October 2026: first published