What "refreshing" your computer means and when to do it

Refreshing your computer means clearing out temporary files, closing programs running in the background, and restarting your system to free up memory and processing power. It is not the same as a factory reset — you keep all your files and programs. A refresh takes 5 to 15 minutes and can make your computer noticeably faster if it has been running for weeks without a restart.

You should refresh your computer when it feels sluggish, programs take a long time to open, or your screen freezes for a few seconds at a time. These are signs that your RAM (the memory your computer uses while it is running) is full and your hard drive is working overtime. A refresh clears that out without erasing anything permanent.

Key Takeaways

  • The simplest refresh is a full restart: shut down completely, wait 10 seconds, and turn the computer back on.
  • On Windows, you can clear temporary files through Settings > System > Storage > Temporary files, then select what to delete and click Remove files.
  • On Mac, restart your computer and hold Command + Option + P + R when ready after the startup sound to reset the RAM cache.
  • Close programs you are not using, especially web browsers with many tabs open, because they consume memory even when you are not actively using them.
  • If your computer is still slow after a refresh, check your hard drive space — if it is more than 90 percent full, you may need to delete large files or programs.

The restart: the fastest way to refresh

The single most effective refresh is a complete shutdown and restart. When your computer restarts, it clears all temporary data from RAM, stops all background processes, and reloads only what it needs. This takes 2 to 5 minutes depending on your computer's age and how many programs you have installed.

On Windows, click the Start button, select Power, and click Shut down. Wait at least 10 seconds after the screen goes black — this ensures the system fully powers down. Then press the power button to turn it back on. On Mac, click the Apple menu, select Shut Down, wait 10 seconds, and press the power button.

Do a full restart at least once a week if you use your computer daily. Many people leave their computers in sleep mode for weeks, which does not clear RAM or stop background processes. A weekly restart prevents slowdowns from building up.

Clearing temporary files on Windows

Windows stores temporary files — cache from websites you visit, old installer files, and fragments from programs you have uninstalled — in a folder that takes up space and slows down your hard drive. Clearing these files is safe and does not affect any of your documents or photos.

Open Settings by pressing Windows key + I. Click System on the left, then Storage. Under Storage, click Temporary files. A window will open showing what can be deleted: Temporary files, Recycle Bin, and Downloads folder are usually safe to clear. Check the boxes next to what you want to remove, then click Remove files. This usually takes 1 to 3 minutes.

If you want to automate this, Windows can delete temporary files automatically. In the same Storage menu, scroll down to Storage Sense and toggle it on. You can set it to run daily, weekly, or monthly. This prevents temporary files from piling up in the first place.

Clearing cache and temporary files on Mac

Mac stores temporary files in hidden folders that are harder to access than Windows, but you can clear them without opening Terminal. The easiest method is to restart your Mac and hold Command + Option + P + R when ready after you hear the startup sound. Hold these keys until you see the Apple logo appear and disappear a second time (usually 20 to 30 seconds). This clears the RAM cache and resets some system settings without deleting your files.

For a deeper clean, open Finder, click Go at the top, then press Option to reveal Library. Open Library, then Caches. You will see folders named after applications. Deleting cache folders for programs you do not use regularly is safe — the program will rebuild its cache the next time you open it. Do not delete the SystemCache folder.

If you prefer a visual tool, the free app Disk Diag shows you which files are taking up the most space and lets you delete them with a click. It is simpler than navigating hidden folders.

Closing background programs and browser tabs

Programs running in the background consume RAM even when you are not looking at them. Web browsers are the biggest culprit — each open tab uses memory, and some websites run scripts that keep using CPU power. Closing unused programs and tabs is one of the fastest ways to feel an when ready improvement.

On Windows, right-click the taskbar and select Task Manager. Look at the Processes tab and sort by Memory to see which programs are using the most. Close anything you are not actively using — do not close Windows processes like Antimalware Service or Windows Explorer. On Mac, open Activity Monitor (search for it in Spotlight), click the Memory tab, and close programs using more than 500 MB if you are not using them.

For your web browser, close tabs you are not reading. If you regularly keep 20+ tabs open, consider using a tab manager extension that suspends inactive tabs and frees up their memory. Most browsers have built-in options for this under Settings > Performance or similar.

Checking your hard drive space

If your computer is still slow after restarting and closing programs, your hard drive may be too full. When a hard drive is more than 90 percent full, the computer slows down because it cannot write temporary files efficiently. Check how much space you have left and delete large files if needed.

On Windows, open Settings > System > Storage. You will see a bar showing how much space is used. If it is mostly full, look at what is taking up space — usually Downloads, Documents, or video files. Move files you do not need to an external hard drive or cloud storage like OneDrive or Google Drive. On Mac, click the Apple menu, select About This Mac, then Storage. The same principle applies: move or delete large files if you are over 85 percent capacity.

A good rule is to keep at least 10 to 15 percent of your hard drive empty. This gives your computer room to work and prevents slowdowns from a full drive.

When to do a full reset instead of a refresh

A refresh solves slowness caused by temporary files and too many running programs. But if your computer is still slow after restarting, clearing temporary files, and closing background programs, the problem may be deeper — malware, a failing hard drive, or too many programs installed. A full reset (also called a factory reset or clean install) erases everything and reinstalls the operating system from scratch.

A full reset is more drastic than a refresh and takes 1 to 3 hours. You should back up all your files first. Do a reset only if a refresh does not help and you have ruled out malware with a scan from Windows Defender or Mac's built-in security tools. If you are unsure whether your computer needs a reset, a refresh is the safer first step.

Frequently Asked Questions

How often should I refresh my computer?

Restart your computer at least once a week if you use it daily. If you leave it running 24/7, restart it every 3 to 5 days. A weekly restart prevents slowdowns from building up and keeps your system stable.

Will refreshing my computer delete my files?

No. A refresh clears temporary files and stops running programs, but it does not touch your documents, photos, or installed programs. Everything you saved stays on your computer. A factory reset is different — that does erase everything.

Why is my computer still slow after I restart it?

If slowness continues after a restart, check your hard drive space and run a malware scan. A full hard drive or malware infection requires more than a refresh. You can also check Task Manager or Activity Monitor to see which programs are using the most memory and close them.

Is it safe to delete files in the Temporary files folder?

Yes, it is completely safe. Temporary files are meant to be deleted — your computer creates new ones as needed. Deleting them frees up space and does not affect any programs or documents.

What is the difference between sleep mode and shutdown?

Sleep mode keeps your computer in a low-power state but does not clear RAM or stop background processes. Shutdown completely powers off the computer and clears everything from memory. For a true refresh, use shutdown instead of sleep.