Speed Up a Slow Computer

Improve a slow computer by restarting it, reducing background load, freeing storage, updating software, scanning for malware, and checking for hardware limits or overheating.

Easy · 30-90 minutes

Tools

  • Task Manager or Activity Monitor
  • Built-in storage cleanup tool
  • Trusted antivirus or anti-malware software
  • System update settings

Materials

  • Backup of important files
  • Internet connection

Safety

  • Back up important files before uninstalling software, cleaning storage, or making system changes.
  • Only download updates, drivers, and security tools from the computer manufacturer or official vendor websites.
  • Do not delete files from system folders unless you are sure they are safe to remove.
  • If the computer makes unusual noises, overheats, or shows drive errors, stop and check hardware before continuing.
  • If malware is suspected and sensitive accounts were used on the computer, change passwords from a different trusted device.

Steps

  1. Step 1: Restart the computer and test basic performance

    • Save your work and restart the computer instead of just closing the lid or leaving it on.
    • After restart, open only the apps you need and check whether the system feels faster.
    • If the computer is still slow immediately after startup, continue to the next steps.

    Check: The computer starts normally and responds better for at least a few minutes after restart. · You can tell whether the slowdown happens all the time or only after opening certain apps.

  2. Step 2: Find apps using too much CPU, memory, or disk

    • Open Task Manager on Windows or Activity Monitor on macOS.
    • Sort by CPU, Memory, and Disk usage to identify apps or processes using unusually high resources.
    • Close apps you recognize that are not needed right now.
    • If one specific app repeatedly causes the slowdown, update, reset, or reinstall that app later.

    Check: You can identify which app or process is consuming the most resources. · Closing unnecessary apps reduces fan noise, lag, or long loading times.

  3. Step 3: Disable unnecessary startup programs

    • Open the startup apps section in system settings or Task Manager.
    • Disable nonessential programs that launch automatically when the computer starts.
    • Keep security software, touchpad utilities, graphics tools, and other essential device software enabled if you are unsure.
    • Restart the computer after changing startup items.

    Check: Fewer apps open automatically after sign-in. · Startup time improves and the desktop becomes usable sooner.

  4. Step 4: Free up storage space

    • Check available free space on the main drive.
    • Delete or move large unused files such as downloads, duplicate videos, or old installers.
    • Empty the recycle bin or trash.
    • Use the built-in storage cleanup tool to remove temporary files and other safe-to-clear items.
    • Uninstall programs you no longer use.

    Check: The main drive has meaningful free space available. · The system is less likely to freeze during updates, browsing, or file operations.

  5. Step 5: Install operating system, browser, and driver updates

    • Open system update settings and install pending operating system updates.
    • Update your web browser and the apps you use most often.
    • If performance problems began after hardware changes or display issues appeared, install official drivers from the device manufacturer.
    • Restart after updates complete.

    Check: There are no major pending system updates left. · The computer runs more smoothly after restart and updated apps open normally.

  6. Step 6: Run a malware scan

    • Open your trusted antivirus or built-in security tool.
    • Update virus definitions if needed.
    • Run a full scan and follow recommended actions for anything detected.
    • Restart the computer after cleanup if prompted.

    Check: The scan completes successfully. · Any detected threats are removed, quarantined, or clearly identified for follow-up.

  7. Step 7: Check browser and app clutter

    • Remove browser extensions you do not use or do not recognize.
    • Reduce the number of open tabs and close unused apps running in the background.
    • Clear browser cache if websites load slowly or behave oddly.
    • Sign out of or disable unnecessary sync or helper apps that run constantly.

    Check: The browser opens faster and uses less memory. · General responsiveness improves during normal tasks.

  8. Step 8: Check for overheating and hardware limits

    • Make sure air vents are not blocked by dust, fabric, or a soft surface.
    • Listen for constant loud fans, clicking sounds, or repeated stuttering during simple tasks.
    • If the computer has very little memory or uses a hard drive instead of an SSD, hardware may be the main limit.
    • If you are comfortable, check the device model specifications to see whether a RAM or SSD upgrade is possible.

    Check: The computer is not excessively hot during light use. · You can tell whether the issue is likely software-related or caused by aging hardware.

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Speed Up a Slow Computer0 of 8 steps done

Written by AI, not checked by a tradesperson. How this works

Step-by-Step Instructions

Step 1 of 8

Restart the computer and test basic performance

Diagram for step 1: Restart the computer and test basic performance
Fig. 1Restart the computer and test basic performance
  • Save your work and restart the computer instead of just closing the lid or leaving it on.
  • After restart, open only the apps you need and check whether the system feels faster.
  • If the computer is still slow immediately after startup, continue to the next steps.
Check

The computer starts normally and responds better for at least a few minutes after restart. • You can tell whether the slowdown happens all the time or only after opening certain apps.

Was this step clear?
Step 2 of 8

Find apps using too much CPU, memory, or disk

Diagram for step 2: Find apps using too much CPU, memory, or disk
Fig. 2Find apps using too much CPU, memory, or disk
  • Open Task Manager on Windows or Activity Monitor on macOS.
  • Sort by CPU, Memory, and Disk usage to identify apps or processes using unusually high resources.
  • Close apps you recognize that are not needed right now.
  • If one specific app repeatedly causes the slowdown, update, reset, or reinstall that app later.
Check

You can identify which app or process is consuming the most resources. • Closing unnecessary apps reduces fan noise, lag, or long loading times.

Was this step clear?
Step 3 of 8

Disable unnecessary startup programs

Diagram for step 3: Disable unnecessary startup programs
Fig. 3Disable unnecessary startup programs
  • Open the startup apps section in system settings or Task Manager.
  • Disable nonessential programs that launch automatically when the computer starts.
  • Keep security software, touchpad utilities, graphics tools, and other essential device software enabled if you are unsure.
  • Restart the computer after changing startup items.
Check

Fewer apps open automatically after sign-in. • Startup time improves and the desktop becomes usable sooner.

Was this step clear?
Step 4 of 8

Free up storage space

Diagram for step 4: Free up storage space
Fig. 4Free up storage space
  • Check available free space on the main drive.
  • Delete or move large unused files such as downloads, duplicate videos, or old installers.
  • Empty the recycle bin or trash.
  • Use the built-in storage cleanup tool to remove temporary files and other safe-to-clear items.
  • Uninstall programs you no longer use.
Check

The main drive has meaningful free space available. • The system is less likely to freeze during updates, browsing, or file operations.

Was this step clear?
Step 5 of 8

Install operating system, browser, and driver updates

Diagram for step 5: Install operating system, browser, and driver updates
Fig. 5Install operating system, browser, and driver updates
  • Open system update settings and install pending operating system updates.
  • Update your web browser and the apps you use most often.
  • If performance problems began after hardware changes or display issues appeared, install official drivers from the device manufacturer.
  • Restart after updates complete.
Check

There are no major pending system updates left. • The computer runs more smoothly after restart and updated apps open normally.

Was this step clear?
Step 6 of 8

Run a malware scan

Diagram for step 6: Run a malware scan
Fig. 6Run a malware scan
  • Open your trusted antivirus or built-in security tool.
  • Update virus definitions if needed.
  • Run a full scan and follow recommended actions for anything detected.
  • Restart the computer after cleanup if prompted.
Check

The scan completes successfully. • Any detected threats are removed, quarantined, or clearly identified for follow-up.

Was this step clear?
Step 7 of 8

Check browser and app clutter

Diagram for step 7: Check browser and app clutter
Fig. 7Check browser and app clutter
  • Remove browser extensions you do not use or do not recognize.
  • Reduce the number of open tabs and close unused apps running in the background.
  • Clear browser cache if websites load slowly or behave oddly.
  • Sign out of or disable unnecessary sync or helper apps that run constantly.
Check

The browser opens faster and uses less memory. • General responsiveness improves during normal tasks.

Was this step clear?
Step 8 of 8

Check for overheating and hardware limits

Diagram for step 8: Check for overheating and hardware limits
Fig. 8Check for overheating and hardware limits
  • Make sure air vents are not blocked by dust, fabric, or a soft surface.
  • Listen for constant loud fans, clicking sounds, or repeated stuttering during simple tasks.
  • If the computer has very little memory or uses a hard drive instead of an SSD, hardware may be the main limit.
  • If you are comfortable, check the device model specifications to see whether a RAM or SSD upgrade is possible.
Check

The computer is not excessively hot during light use. • You can tell whether the issue is likely software-related or caused by aging hardware.

Was this step clear?

Common Mistakes

  • ×Disabling every startup item without knowing what it does.
  • ×Deleting files from system folders instead of using built-in cleanup tools.
  • ×Installing driver updater tools from random websites.
  • ×Assuming more free space is unnecessary when the drive is nearly full.
  • ×Keeping dozens of browser tabs and background apps open while testing performance.
  • ×Ignoring early signs of hardware failure such as clicking drives, overheating, or crashes.

When to Call a Professional

  • The computer is still very slow after completing the software cleanup steps.
  • You hear clicking, grinding, or repeated beep sounds.
  • The system overheats, shuts down unexpectedly, or shows drive or memory errors.
  • You suspect failing hardware but are not comfortable opening the device or replacing parts.
  • The computer contains important business or personal data and malware may have compromised it.

Notes

  • A computer with an SSD and adequate RAM usually feels much faster than one with a traditional hard drive and limited memory.
  • Leave enough free space on the main drive so the operating system and apps can work normally.
  • If only one app is slow, the problem may be with that app rather than the whole computer.
  • Performance testing is most reliable immediately after a restart and with only a few apps open.

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