How to Fix 100% Memory Usage on Windows

What Causes This?

100% memory usage usually means your RAM is being fully used by apps, background processes, or Windows services. This can happen if too many programs start with Windows, a browser has too many tabs open, or an app has a memory leak and keeps consuming more RAM over time. It can also be caused by outdated drivers, malware, or a paging file that is misconfigured.

Common Symptoms

• PC feels slow even when only a few apps are open
• Programs freeze, crash, or take a long time to respond
• Browser tabs reload constantly or become unresponsive
• Task Manager shows Memory at or near 100%
• Windows stutters when switching between apps

How to Fix It Manually

1. Check what is using your memory

   • Open Task Manager with Ctrl + Shift + Esc.
   • Click More details if needed.
   • Open the Processes tab and click the Memory column to sort by highest usage.
   • Look for apps using unusually large amounts of RAM. If you find one you do not need right now, select it and click End task.

2. Restart your PC

   • Click Start > Power > Restart.
   • A restart clears temporary memory usage and stops stuck background processes.
   • After restarting, open Task Manager again and check whether memory usage is still unusually high.

3. Disable unnecessary startup apps

   • Open Task Manager with Ctrl + Shift + Esc.
   • Go to the Startup apps tab.
   • Right-click apps you do not need launching at startup and choose Disable.
   • Focus on chat apps, game launchers, cloud sync tools, and other non-essential software.

4. Close browser tabs and remove heavy extensions

   • If your browser is using a lot of memory, close unused tabs and windows.
   • In Chrome or Edge, open the browser menu and review Extensions.
   • Disable or remove extensions you do not use, especially coupon tools, download helpers, and tab managers.
   • Then restart the browser and check memory usage again.

5. Adjust virtual memory settings

   • Press Windows key + S, type advanced system settings, and open View advanced system settings.
   • Under Performance, click Settings.
   • Open the Advanced tab, then under Virtual memory, click Change.
   • Make sure Automatically manage paging file size for all drives is checked.
   • Click OK and restart your PC if you changed the setting.

6. Scan for malware

   • Open Windows Security from the Start menu.
   • Click Virus & threat protection.
   • Select Quick scan. If memory usage remains high, run a Full scan.
   • Malware often runs hidden background processes that consume RAM.

7. Update Windows and drivers

   • Go to Settings > Windows Update and click Check for updates.
   • Install any available updates and restart.
   • Also update graphics and chipset drivers from your PC or motherboard manufacturer if the issue started recently.

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