Why Is My Computer Running Slow?
Common causes of slow PCs and what actually fixes them — without unnecessary upgrades.
- Windows
- By Ray Berro, Tech4Service
A slow computer is usually a symptom, not the disease. Before you buy a new machine, check these common causes — most are fixable without replacing hardware.
Startup overload
Too many programs launching at boot is the #1 reason Windows feels sluggish after a few months. Open Task Manager → Startup and disable anything you don't need immediately (keep antivirus and backup tools).
Low disk space
When your drive is above 90% full, Windows struggles with temp files and updates. Clear downloads, uninstall unused apps, and move large media to an external drive or cloud storage.
Hard drive vs SSD
Mechanical hard drives are the bottleneck on most older PCs. Swapping to an SSD is often the single best upgrade — boot times drop from minutes to seconds. We can clone your existing drive so you keep all your files.
Malware and bloatware
Browser extensions, adware, and cryptominers can consume CPU in the background. A proper malware cleanup goes beyond a quick scan — we remove persistence mechanisms and verify stability afterward.
When to bring it in
If the slowdown appeared suddenly, you hear clicking from the drive, or the PC freezes under normal use, book a diagnostic. We'll identify whether it's software, failing hardware, or both — and quote before any repair.
Common Questions
When should I stop troubleshooting and book a repair?
If the problem appeared suddenly, involves hardware sounds (clicking, grinding), liquid damage, or persists after safe software steps — book a diagnostic. We'll confirm the fix and price before work begins.
How much does professional repair cost?
Most repairs fall in the $89–$250 range after diagnostics. See our pricing page or book a free basic diagnostic on most drop-off repairs.
Rather leave it to a pro?
Book a diagnostic — we'll confirm the fix, price, and timeline. 30-day labour warranty on completed repairs.