High Memory Usage in Windows 11: What Is Normal and How to Fix It

Task Manager shows memory at 80 or 90 percent and the PC feels sluggish. Is something wrong? High memory usage in Windows 11 is often completely normal, because Windows deliberately fills spare memory with data it may need again. But if your computer is slowing down, freezing or warning that memory is low, something is genuinely using too much. This guide shows how to tell the difference, find the cause, and free up memory safely.

This is an independent guide, not affiliated with Microsoft. Steps are for Windows 11; Windows 10 is very similar.

Is it actually a problem?

What you see	What it means
Memory high, PC runs smoothly	Normal. Windows is using spare RAM as a cache.
Memory high, PC slows when you open more apps	You are near the limit; reduce what is open or add RAM.
Memory keeps climbing until the PC freezes	One app is leaking memory, or malware; find it below.
“Your computer is low on memory” warning	Real shortage; close apps now, then follow the fixes.

Step 1: Find what is using memory

1. Press Ctrl + Shift + Esc to open Task Manager (or right-click Start and choose Task Manager).
2. On the Processes tab, click the Memory column heading to sort the biggest users to the top.
3. Click the arrow next to an app to see its individual parts, such as browser tabs.
4. Open the Performance tab and select Memory. The graph shows how much is In use, how much is Available, the total installed, and how many memory slots are used.

Write down the top three apps. Most of the time the answer is obvious: a browser with dozens of tabs, a video editor, a game or a virtual machine.

Step 2: Tame the browser

Browsers are the most common reason for high memory use, because every tab, extension and web app takes its own share.

• Close tabs you are not using. Bookmark them or use the browser’s reading list if you want them later.
• Turn on memory saving. In Chrome go to Settings > Performance and turn on Memory Saver, which frees memory from inactive tabs. In Edge, turn on sleeping tabs under Settings > System and performance.
• Remove extensions you do not need. Each one uses memory, and some are adware; see how to manage and remove browser extensions.
• If the browser is slow even with few tabs, follow browser running slow.

Step 3: Trim startup apps and restart

Many apps start with Windows and sit in the background using memory all day.

1. Open Settings > Apps > Startup.
2. Switch off apps you do not need the moment you sign in, such as updaters, game launchers and chat apps you rarely use.
3. Restart the PC (Start > Power > Restart, not just Shut down and power on).

A restart is the only true way to “clear RAM”, and it fixes apps that have slowly leaked memory over days. Our startup programs guide has more detail.

Step 4: Check for malware and problem processes

• Unknown process using lots of memory: right-click it in Task Manager and choose Search online to learn what it is. Do not end processes you do not recognise if they belong to Windows.
• Antimalware Service Executable using memory during a scan is normal; if it never settles, see Antimalware Service Executable high CPU or memory.
• Run a full scan in Windows Security > Virus & threat protection > Scan options. Our guide to removing malware with Windows Security explains the options, including the offline scan.

Step 5: Leave virtual memory on automatic

Windows uses part of the drive as overflow memory, called the paging file. Some websites recommend turning it off or setting a fixed size. For most people that causes crashes rather than speed. In Settings > System > About > Advanced system settings > Performance Settings > Advanced > Virtual memory, make sure Automatically manage paging file size for all drives is ticked. If the drive is almost full, Windows cannot grow the paging file, so also check 100% disk usage and free up space.

Step 6: Test the memory itself

If the PC crashes, shows blue screens or freezes even with little open, the memory chips may be faulty.

1. Save your work.
2. Press Windows key + R, type mdsched and press Enter.
3. Choose Restart now and check for problems.

Windows runs a memory test and shows the result after you sign in again. Errors mean a memory stick should be checked or replaced by the maker or a repair shop. If you also get blue screens, see how to read a stop code.

Do not use RAM cleaner apps

“RAM cleaner”, “memory booster” and “PC optimizer” programs claim to free memory, but Windows already manages memory well. At best they empty the cache Windows uses to speed things up, so apps open more slowly afterwards; at worst they are adware or scareware. Uninstall any you have and use the steps above instead.

When adding RAM is the real answer

If memory sits near the top during your normal work, even after these steps, the PC simply does not have enough for what you do. Check the Performance > Memory page for the total and the Slots used figure, then read how much RAM do I need and how to check your PC specs. Many laptops have memory soldered to the board and cannot be upgraded; the maker’s specifications for your model will say. For a slow PC in general, laptop running very slow covers the other common causes.