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Computer Running Slow? Here's How to Fix It

A sluggish computer costs you real time and money. Before you spend $800 on a new one, try these fixes — most slow computers can be brought back to life in 20 minutes.

Common causes
  • Too many programs launching at startup
  • Hard drive is nearly full (under 10% free space left)
  • Old spinning hard drive instead of an SSD
  • Malware or unwanted background programs consuming resources
  • Not enough RAM for the software you're running

Step-by-step fix

  1. 1
    Disable startup programs
    On Windows, press Ctrl + Shift + Esc to open Task Manager, click the Startup tab, and disable everything you don't need open immediately when you log in. On Mac, go to System Settings → General → Login Items and remove unnecessary apps.
  2. 2
    Free up disk space
    On Windows, search for 'Disk Cleanup', run it on your C: drive, and check all boxes including 'Temporary files'. Also go to Settings → Apps and uninstall software you never use. Aim to have at least 15% of your drive free.
  3. 3
    Check for malware
    Run a full scan with Windows Defender (search 'Windows Security' → Virus & threat protection → Quick scan, then Full scan). If you're on Mac, run Malwarebytes Free — one scan is free and catches most issues.
  4. 4
    Restart your computer (actually restart — not sleep)
    A proper restart clears RAM and closes background processes that accumulate over days of use. If you haven't fully restarted in over a week, do it now before anything else.
  5. 5
    Check RAM and CPU usage
    Open Task Manager (Ctrl + Shift + Esc) → Performance tab. If CPU or RAM usage is consistently above 85% while you're just browsing, your hardware may be genuinely under-specced. Consider upgrading RAM (often $40–$80) or replacing a spinning HDD with an SSD.
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