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    1 min read 6 stepsFebruary 16, 2026Verified February 2026

    How to Troubleshoot Slow PC Performance

    Diagnose and fix a sluggish Windows PC with these advanced troubleshooting techniques.

    In this guide (6 steps):

    1. 1.Check Task Manager
    2. 2.Check disk health
    3. 3.Scan for malware
    4. 4.Disable visual effects
    5. 5.Consider hardware upgrades
    6. 6.Check for overheating
    1

    Check Task Manager

    ~15s
    Press Ctrl+Shift+Esc → Processes tab. Sort by CPU or Memory to find resource-hogging programs.
    2

    Check disk health

    ~15s
    Open Command Prompt as admin and run "wmic diskdrive get status" to check your drive's health.
    3

    Scan for malware

    ~15s
    Run a full scan with Windows SecurityVirus & Threat ProtectionFull Scan.
    4

    Disable visual effects

    ~15s
    Search "Adjust appearance" → Choose "Adjust for best performance" for older PCs.
    5

    Consider hardware upgrades

    ~15s
    An SSD upgrade or additional RAM can dramatically improve performance on older computers.
    6

    Check for overheating

    ~15s
    If your PC slows down over time, clean dust from vents and ensure fans are working properly.

    Quick Tip

    For more tips, visit support.microsoft.com/en-us/windows/tips-to-improve-pc-performance-in-windows — Microsoft's official guide to speeding up a slow PC.

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    Official Resources

    Microsoft SupportHow-To Geek — WindowsGCFGlobal — Windows Basics

    Sources used to create and verify this guide. View all sources →

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    How to Troubleshoot Slow PC Performance — Step-by-Step Guide | TekSure