How to Make a Slow Computer Faster Without Buying Anything

If your computer feels slow, don't buy an upgrade yet. Restart it, reduce unnecessary startup programs, check available storage, install pending updates, and identify apps consuming excessive resources. Those simple checks can solve many everyday performance problems without changing hardware.

This guide focuses on Windows 11 and current versions of macOS. Menu names were checked in September 2026.

Start with a real restart

A computer that has been sleeping for days or weeks can accumulate open programs and background processes.

Save your work and restart the computer normally. After signing back in, wait a minute or two before opening your usual programs.

Then see whether the problem still exists.

If the computer is suddenly responsive again, you probably don't need to do anything more complicated.

Reduce programs that start automatically

On Windows 11, open Settings > Apps > Startup. Windows lists programs configured to start when you sign in. You can switch off programs you don't need immediately.

Task Manager provides another useful view: right-click Start, select Task Manager, and open Startup apps. Microsoft says Task Manager can also show the startup impact of listed applications.

Don't disable something merely because you don't recognize its name. Look it up first.

On a Mac, go to Apple menu > System Settings > General > Login Items & Extensions. The Open at Login section controls items that start when you log in.

Check your storage

A nearly full system drive deserves attention.

In Windows, open Settings > System > Storage. On a Mac, open System Settings > General > Storage.

Look for unusually large applications, downloads, videos, old installers, or files you genuinely no longer need.

Don't randomly delete folders from Windows, Program Files, Library, or other system locations.

Find the program doing the work

On Windows, press Ctrl + Shift + Esc to open Task Manager. Check the Processes tab for unusually high CPU, memory, or disk usage.

Microsoft recommends Task Manager for identifying resource-heavy processes when troubleshooting performance.

On a Mac, use Activity Monitor. Apple also recommends checking memory usage there when investigating a slow Mac.

Seeing high usage doesn't automatically mean something is wrong. A video editor, game, update, or browser with many tabs may legitimately use substantial resources.

Don't install a mystery PC cleaner

You generally don't need a third-party cleaner simply because an advertisement says your computer has thousands of problems.

Use the operating system's own tools first.

How to confirm the fix

Restart again after making changes. Open the programs you normally use and compare startup time and responsiveness.

If the computer remains painfully slow even with few applications running, the next step is diagnosis—not random optimization. Aging storage, insufficient memory, overheating, malware, or a hardware problem can require a different solution.

Sources and Further Reading

Microsoft Support: Configure Startup applications in Windows — https://support.microsoft.com/en-us/windows/experience/startup-boot/configure-startup-applications-in-windows

Microsoft Support: Tips to improve PC performance in Windows — https://support.microsoft.com/en-us/windows/experience/performance-optimization/tips-to-improve-pc-performance-in-windows

Apple Support: If your Mac runs slowly — https://support.apple.com/guide/mac-help/if-your-mac-runs-slowly-mchlp1731/mac