The fastest way to gain memory is to close programs you are not using and delete files you do not need

Your PC's memory — also called RAM — fills up when you run programs at the same time. The more programs open, the slower your computer works because it has to juggle all of them. You gain memory back by closing programs you have finished with, restarting your computer, and removing files that take up disk space. Some of these steps take seconds; others take longer but free up much more room.

Memory and storage are different things. RAM is the fast temporary space your computer uses while programs are running. Storage is the hard drive or solid-state drive where your files live permanently. Both can get full, and both slow your PC down. This guide covers how to free up both.

Key Takeaways

  • Closing programs you are not actively using is the fastest way to free RAM and improve speed right now.
  • Restarting your computer clears RAM completely and often fixes slowness without any other work.
  • Uninstalling programs you no longer use frees up disk storage and removes them from running in the background.
  • Deleting old files, downloads, and temporary files can free up gigabytes of storage space.
  • Disabling startup programs prevents them from loading automatically and using memory when you turn on your PC.

Close programs running in the background right now

Open your Task Manager to see which programs are using memory. On Windows, press Ctrl + Shift + Esc, or right-click the taskbar and select Task Manager. Look at the Memory column — programs at the top use the most RAM. Close any program you are not using by clicking it and selecting End Task.

Some programs run in the background even when you do not see them. Check the system tray — the small icons in the bottom right corner of your screen — and close programs there too. Right-click the icon and look for Quit, Exit, or Close. This frees up memory when ready.

Restart your computer to clear all RAM

Restarting clears all RAM and stops every program from running. This is often the fastest fix for a slow PC. Shut down your computer completely, wait 30 seconds, and turn it back on. You will notice the difference when ready if memory was the problem.

Restart at least once a week, or more often if your PC slows down during the day. Many people leave their computers on for weeks and never restart, which fills RAM with old data and background processes.

Uninstall programs you no longer use

Programs take up storage space even when they are closed. If you have not used a program in months, uninstalling it frees up gigabytes. On Windows, go to Settings, select Apps, then Apps & Features. Find the program you want to remove, click it, and select Uninstall. Follow the prompts to finish.

Pay special attention to programs that came with your PC but you never use — trial versions of software, games, or tools you installed once and forgot about. These are safe to remove. If you are unsure whether a program is important, search its name online before uninstalling.

Delete files and folders taking up the most space

Large files and folders eat up storage quickly. Videos, photos, and old backups are usually the biggest culprits. Right-click your C: drive (or whichever drive stores your files), select Properties, and look at how much space is used. Then open File Explorer and look in your Downloads, Documents, Pictures, and Videos folders for files you no longer need.

Delete old downloads — most people never look at them again after downloading. Move important files to an external hard drive or cloud storage like OneDrive or Google Drive before you delete them, so you do not lose anything. Empty your Recycle Bin afterward to permanently remove the files and recover the space.

Clear temporary files and cache

Windows stores temporary files that pile up over time and waste space. Press Windows key + R, type %temp%, and press Enter. Select all files in the folder (Ctrl + A), delete them, and empty the Recycle Bin. This usually frees up hundreds of megabytes or more.

You can also use the Disk Cleanup tool. Press Windows key, type Disk Cleanup, and open it. Select your C: drive, check the boxes for Temporary Files, Recycle Bin, and Temporary Internet Files, then click Delete. This is safer than manually deleting temp files because it only removes files Windows knows are safe to delete.

Turn off programs that start automatically when you boot up

Many programs load when you turn on your PC, using memory before you even open them. Open Task Manager (Ctrl + Shift + Esc), go to the Startup tab, and look at the list. Right-click any program you do not need to start automatically and select Disable. Common culprits are Adobe Reader, Spotify, Discord, and antivirus software you replaced.

Be careful not to disable programs you actually need, like your current antivirus or chipset drivers. If you are unsure, search the program name online or leave it enabled. You can always turn it back on later if you need it.

Check your hard drive for viruses and malware

Viruses and malware run in the background and use memory without you knowing. They also slow your PC significantly. Run a full scan with Windows Defender, which is built into Windows. Press Windows key, type Windows Security, open it, and select Virus & Threat Protection. Click Scan Options, select Full Scan, and click Scan Now. This takes 30 minutes to an hour but finds hidden threats.

If you suspect a serious infection, read Malwarebytes from malwarebytes.com and run a scan with that too. Malwarebytes catches threats Windows Defender sometimes misses. Both tools are free to use for scanning.

Frequently Asked Questions

How much RAM do I need for my PC to run smoothly?

Most people need 8 GB of RAM for everyday use like web browsing, email, and documents. If you edit video, use design software, or play games, 16 GB is better. You can check how much you have by right-clicking This PC, selecting Properties, and looking at Installed RAM.

What is the difference between RAM and storage?

RAM is temporary memory your PC uses while programs run — it clears when you restart. Storage is your hard drive or solid-state drive where files stay permanently. Both affect speed, but RAM affects it more directly. A full hard drive also slows your PC because Windows needs free space to work.

Will adding more RAM make my PC faster?

If your PC is slow because RAM is full, adding more RAM helps. But if your hard drive is full or you have malware, more RAM will not fix it. Check Task Manager to see if RAM is the problem — if Memory is above 80 percent when you are not running heavy programs, more RAM would help.

Is it safe to delete files from the Temp folder?

Yes, Windows Temp files are safe to delete. They are temporary files programs create and forget about. The only risk is if a program is actively using a temp file when you delete it, but this rarely causes problems. Using Disk Cleanup is safer because it only deletes files Windows confirms are not in use.

How often should I restart my PC?

Restart at least once a week, or whenever you notice your PC slowing down during the day. If you leave your PC on 24/7, restart it every few days. Restarting clears RAM and stops background processes from piling up, which is the simplest way to keep your PC running fast.