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How to Speed Up a Slow Windows PC

A slow Windows PC usually needs a tune-up, not new hardware, and most fixes use tools already built in. Clean up startup apps, free drive space, adjust visual effects, and run a security scan to restore everyday speed.

By Co-authored by HowCompass Editorial Team · 8 steps · Technology · Updated November 14, 2026

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  1. 1. Restart and Install Pending Windows Updates

    Restart the computer first, since a fresh boot clears stuck processes and temporary glitches. Then open Settings, go to Windows Update, and install every available update, including optional driver updates. Updated system files and…

  2. 2. Check Task Manager for Resource Hogs

    Press Control, Shift, and Escape together to open Task Manager, then click the Processes tab. Sort by the CPU, Memory, and Disk columns to find any single program using a large share of resources. A browser tab or background app stuck…

  3. 3. Disable Apps That Launch at Startup

    In Task Manager, open the Startup apps tab and look at the Startup impact column for each entry. Right-click and select Disable for apps you do not need the moment you sign in, such as chat clients, game launchers, and updater helpers.…

  4. 4. Free Space With Storage Sense and Disk Cleanup

    Open Settings, then System, then Storage, and turn on Storage Sense so Windows automatically deletes temporary files and empties the Recycle Bin. For a deeper clean, run Disk Cleanup or use the Storage page to remove old Windows update…

  5. 5. Uninstall Programs You No Longer Use

    Open Settings, then Apps, then Installed apps, and sort the list by size or install date. Remove trial software, old toolbars, duplicate utilities, and games you have not opened in months by selecting Uninstall. Fewer installed programs…

  6. 6. Adjust Visual Effects for Best Performance

    Open the Start menu, search for Adjust the appearance and performance of Windows, and open the Performance Options dialog. Select Adjust for best performance, or keep a few essentials such as smooth edges of screen fonts. Turning off…

  7. 7. Choose a Balanced or High-Performance Power Plan

    Open Control Panel, choose Power Options, and select the Balanced or High performance plan instead of Power saver. On a laptop, plug in the power adapter while doing demanding work, because battery saver modes deliberately throttle the…

  8. 8. Scan for Malware With Windows Security

    Open Windows Security from the Start menu, choose Virus and threat protection, and run a Full scan or Microsoft Defender Offline Scan. Malware and unwanted browser extensions can quietly consume CPU and network bandwidth, so removing them…