The fastest way to free up memory right now

Close programs you are not using. Every open program takes up memory, and closing them releases it back when ready. Look at your taskbar or dock and close web browser tabs, messaging apps, video players, and anything else running in the background. If you have 20 browser tabs open and only need three, closing the others will free up gigabytes of memory in seconds.

After closing programs, restart your computer. A restart clears temporary memory files and stops background processes that have been running since you last turned it on. This is the single most effective thing you can do, and it takes about five minutes. Many memory problems disappear after a restart because Windows or macOS clears out files it was holding in active memory.

Key Takeaways

  • Closing unused programs and browser tabs frees memory when ready without deleting any files.
  • Restarting your computer clears temporary memory and stops background processes that accumulate over time.
  • Uninstalling programs you no longer use removes them from your hard drive and prevents them from running in the background.
  • Disabling startup programs prevents them from loading when you turn on your computer, which speeds up startup and reduces memory use.
  • Clearing your browser cache and temporary files removes stored data that builds up and takes up storage space.

Uninstall programs you no longer use

Programs take up storage space on your hard drive and often run background processes even when you are not using them. Go to your Control Panel (Windows) or System Preferences (Mac) and look at your installed programs list. Uninstall anything you have not opened in months. This includes trial software, games you finished, and duplicate programs.

On Windows, open Control Panel, select Programs, then Programs and Features. Click on a program name and select Uninstall. On a Mac, open Applications in Finder, right-click the program, and select Move to Trash. Be careful not to uninstall programs you need — if you are unsure what something does, search for its name online before removing it.

Turn off startup programs

Many programs are set to launch automatically when you turn on your computer, which slows your startup and uses memory from the moment you log in. You can disable most of them without breaking anything. On Windows, press Ctrl+Shift+Esc to open Task Manager, click the Startup tab, and right-click any program you do not need to run at startup. Select Disable.

On a Mac, go to System Preferences, select General, then click Login Items. Select any program in the list and click the minus button to remove it. Common culprits are cloud storage programs, messaging apps, and software updaters. Disable the ones you do not need running all the time. You can always launch them manually when you want to use them.

Clear your browser cache and temporary files

Your web browser stores copies of web pages, images, and videos you have visited so they load faster next time. Over months, this cache grows to gigabytes. Clearing it frees up space and can speed up your browser. In Chrome, Firefox, or Edge, press Ctrl+Shift+Delete (Windows) or Command+Shift+Delete (Mac) to open the Clear Browsing Data window. Select All Time, check Cached Images and Files, and click Clear Data.

Windows also stores temporary files in a Temp folder. Press Windows Key+R, type %temp%, and press Enter. Select all files (Ctrl+A), delete them, and restart your computer. Some files may be in use and will not delete — that is normal. Do not worry about files that stay behind.

Check for malware and viruses

Malicious software can run in the background and consume memory without your knowledge. Run a full scan with Windows Defender (built into Windows) or your antivirus program. On Windows, open Windows Security, click Virus and Threat Protection, then click Scan Options and select Full Scan. This takes 30 minutes to an hour but will catch most threats.

If you suspect a serious infection, read Malwarebytes (free version available) and run a scan with that as well. Malwarebytes catches some threats that Windows Defender misses. If either scan finds something, follow the prompts to remove it. After removal, restart your computer.

Increase your virtual memory

If you have freed up memory and your computer is still slow, you can increase virtual memory — a space on your hard drive that your computer uses as backup memory when physical memory runs out. This is slower than actual memory but prevents your computer from freezing when you run out. On Windows, press Windows Key+Pause to open System, click Advanced System Settings, go to the Advanced tab, and click Settings under Performance. Click the Advanced tab again, then Change under Virtual Memory. Increase the value and click Set.

On a Mac, virtual memory is managed automatically and cannot be adjusted by the user. If a Mac is running out of memory, the best solution is to close programs or add physical RAM (which requires opening the computer or buying an external drive).

Monitor memory use over time

Open Task Manager (Windows) or Activity Monitor (Mac) regularly to see which programs are using the most memory. On Windows, press Ctrl+Shift+Esc. On a Mac, open Applications, go to Utilities, and click Activity Monitor. Click the Memory tab to sort by memory use. If the same program always appears at the top, consider uninstalling it or finding an alternative. Some programs are memory hogs by design, and switching to a lighter option can make a real difference.

Check your memory use after you restart and after a few hours of work. If memory use climbs steadily, you may have a background process or malware consuming it. If it stays stable, your computer is working normally.

Frequently Asked Questions

What is the difference between memory and storage?

Memory (RAM) is what your computer uses to run programs right now. Storage is the hard drive where files live permanently. Freeing up memory makes your computer faster. Freeing up storage makes room for new files. Both matter, but memory affects speed more directly.

Will clearing my cache delete my passwords or login information?

No. Cache is just copies of web pages. Passwords are stored separately. When you clear browsing data, uncheck Cookies and Site Data if you want to stay logged into websites. Check only Cached Images and Files to clear cache without touching passwords.

Is it safe to delete files in the Temp folder?

Yes. Temp files are meant to be temporary and can be deleted. Windows will not let you delete files that are currently in use, so you cannot break anything by trying. Some files may stay behind, which is fine.

How much memory should my computer have?

For basic web browsing and email, 8 GB is enough. For video editing, gaming, or running many programs at once, 16 GB or more is better. If your computer has less than 8 GB and you cannot add more, closing unused programs becomes more important.

Why does my computer slow down after a few hours even though I am not opening new programs?

Background processes accumulate, temporary files build up, and some programs leak memory (use more and more over time). Restarting clears all of this. If slowdown happens every few hours, restart your computer daily or disable startup programs that you do not need.