To clear RAM in Windows 11, close the apps using the most memory in Task Manager, restart the PC, and stop unnecessary apps from launching at startup or running in the background. For lasting speed, trim visual effects, keep the paging file on automatic, scan for malware and, if memory is regularly above 85–90% in use, add more RAM. "RAM cleaner" apps are not needed and often make things worse.
| Fix | Where | Effect | Time |
|---|---|---|---|
| End memory-hungry apps | Task Manager > Processes | Immediate RAM freed | 1 minute |
| Restart (not shut down) | Start > Power > Restart | Fresh memory state, clears leaks | 2 minutes |
| Disable startup apps | Task Manager > Startup apps | Less RAM used after every boot | 5 minutes |
| Stop background apps | Settings > Apps > Installed apps | Fewer idle processes | 5 minutes |
| Adjust visual effects | Performance Options | Snappier feel on low-end PCs | 2 minutes |
| Add more RAM | Hardware upgrade | The only permanent fix for genuine shortage | Varies |
How do I check what is using RAM in Windows 11?
Press Ctrl + Shift + Esc to open Task Manager, select Processes and click the Memory column header to sort apps by RAM use. Then open Performance > Memory to see total memory in use, what is available, the committed amount and how much is compressed.
The figures on the Performance > Memory page mean different things:
- In use (Compressed): memory actively used by apps and Windows, with the compressed portion in brackets.
- Available: memory that can be handed to apps immediately, including cached data Windows can discard.
- Committed: memory promised to processes, backed by RAM plus the paging file.
- Cached: recently used data kept in RAM to speed up reopening files and apps.
What we commonly see: people panic at 60–70% memory in use on an idle PC. That is normal; Windows deliberately fills spare RAM with cached data, and the SysMain service preloads apps you use often, because unused RAM is wasted RAM. The number to watch is Available running close to zero while the PC feels slow.
What is the quickest way to free up RAM?
The quickest way is to close or end the heaviest apps in Task Manager, then restart the PC. Ending a process returns its memory instantly, and a restart clears memory leaks, stuck background tasks and bloated browser sessions. Use Restart rather than Shut down, because Fast Startup can carry the system state over a normal shutdown.
- Save your work in any open documents.
- In Task Manager > Processes, right-click the app at the top of the Memory column and choose End task.
- Repeat for other apps you do not need, but leave entries you do not recognise under Windows processes alone.
- Select Start > Power > Restart.
Cause and effect: Fast Startup saves the Windows kernel to disk at shutdown so the next boot is quicker, which means kernel-level memory problems can survive a shutdown. A restart performs a full reload instead. Our guide to sleep vs hibernate vs shut down explains how each power state treats memory.
Web browsers are often the biggest consumer. Closing unused tabs, removing extensions you no longer use and enabling the browser's own memory-saving or sleeping-tabs feature can free more RAM than any system setting.
How do I stop apps from using RAM at startup?
Open Task Manager, select Startup apps, right-click each program you do not need the moment Windows starts and choose Disable. The app still works when you open it manually; it simply stops loading into memory at every boot. The Startup impact column shows which entries slow startup most.
- Press Ctrl + Shift + Esc and choose Startup apps in the left pane.
- Sort by Startup impact.
- Right-click chat apps, game launchers, updaters and cloud tools you rarely use and select Disable.
- Keep security software, audio, touchpad and graphics control utilities enabled.
Next, limit Microsoft Store apps that run in the background. Go to Settings > Apps > Installed apps, select the ... menu next to an app, choose Advanced options, and under Background app permissions set Let this app run in background to Never. Desktop programs do not appear here and must be changed in their own settings, as Microsoft notes in its guide to Windows background apps.
If you suspect a stubborn background program but cannot identify it, a clean boot starts Windows with only Microsoft services so you can compare memory use. Removing Windows 11 widgets also stops the Widgets board and its web runtime loading in the background.
Do visual effects slow down Windows 11?
On modern hardware with a dedicated or recent integrated GPU, visual effects have little impact. On older or low-memory PCs, turning off animations, shadows and transparency can make the desktop feel noticeably more responsive. Search for Adjust the appearance and performance of Windows and choose Adjust for best performance.
- Select Start, type
Adjust the appearance and performance of Windowsand open the result. - On the Visual Effects tab, choose Adjust for best performance.
- Optionally re-tick Smooth edges of screen fonts so text stays readable.
- Select Apply.
You can also switch off Transparency effects and Animation effects in Settings > Accessibility > Visual effects. On a laptop, set Settings > System > Power & battery > Power mode to Best performance when plugged in, accepting slightly shorter battery life and more warmth.
Should I change virtual memory or turn off memory compression?
For almost everyone, no. Leave the paging file set to Automatically manage paging file size for all drives and leave memory compression on. Both features let Windows hold more data than physical RAM allows, and disabling them usually causes app crashes or out-of-memory warnings rather than any speed gain.
Memory compression squeezes rarely used pages in RAM instead of writing them to disk, which is faster than paging. You can confirm it is active by running Get-MMAgent in PowerShell and checking that MemoryCompression reads True. The compressed amount appears in brackets beside In use in Task Manager.
The paging file (pagefile.sys) is virtual memory on your drive. To review it, search for Adjust the appearance and performance of Windows, open the Advanced tab, and under Virtual memory select Change.
Advanced nuance: the only common reason to adjust it is low free space on the system drive, which can shrink the automatically managed paging file. Freeing space is the better fix, and Storage Sense under Settings > System > Storage can do that automatically. Microsoft's tips to improve PC performance in Windows recommend the same order of fixes.
Can malware or outdated software use up RAM?
Yes. Cryptominers, adware and browser hijackers often run hidden processes that consume memory and CPU constantly. Run a scan from Settings > Privacy & security > Windows Security > Virus & threat protection, starting with a Quick scan, and use Scan options > Microsoft Defender Offline scan if you suspect something deeper.
Outdated drivers and app versions can also leak memory, slowly growing until the PC becomes sluggish. Keep Windows current through Windows Update and get drivers from Windows Update or your PC maker, as covered in our guide to finding and updating drivers in Windows 11.
Avoid pirated software and cracked activators. They are a frequent source of hidden miners and background services, and a genuine Windows 11 Pro licence or properly licensed Office 2024 Professional Plus removes that risk entirely.
Do RAM cleaner apps actually work?
Not in any useful way. RAM cleaners force Windows to empty its cache, which makes the "free memory" number jump briefly, but Windows then has to reload that data from the much slower disk. The result is often a slower PC, plus another background app using memory.
Other myths worth dropping:
- "Disable the paging file if you have lots of RAM": some apps expect a paging file and may crash without one.
- "Defragment an SSD": Windows' Optimise Drives tool already sends the right commands to SSDs automatically.
- "Registry cleaners speed up the PC": they offer no measurable speed gain and risk breaking apps.
- "ReadyBoost adds RAM": it was designed for slow hard drives and offers little on SSD-based PCs.
How do I know if I need more RAM?
You likely need more RAM if Task Manager regularly shows memory above 85–90% in use, the Committed figure exceeds your physical RAM during normal work, and the PC slows while switching apps. In those conditions, Windows leans heavily on the paging file, and no software tweak can match an upgrade.
As a rough guide, 8 GB handles browsing and Office, 16 GB suits heavy multitasking, photo editing and gaming, and 32 GB or more suits video editing and virtual machines. Check Speed, Slots used and Form factor on the Performance > Memory page before buying, and confirm the maximum supported capacity with your PC or motherboard maker.
Many thin laptops have soldered memory that cannot be upgraded, so check your model's specifications before buying modules or opening the case.
Frequently asked questions
Is 100% RAM usage bad in Windows 11?
Brief spikes are harmless, but sustained 100% usage means Windows is paging heavily to disk, which causes stutters, slow app switching and occasional crashes. Find the responsible app in Task Manager by sorting the Memory column, close it, then reduce startup apps or add RAM if it happens daily.
Does restarting Windows 11 clear RAM?
Yes. A restart completely reloads Windows, releasing memory held by apps, leaks and background tasks. With Fast Startup enabled, a normal shut down hibernates the kernel instead, so Restart is the more thorough option when the PC has become sluggish after days of use.
What is a normal amount of RAM usage when idle?
There is no single normal figure, because idle usage depends on installed RAM, security software, cloud sync and startup apps. Several gigabytes in use at idle is typical, and higher numbers are not automatically a problem, because Windows deliberately uses spare memory for caching and releases it when apps need it.
Does Windows 11 Pro use less RAM than Home?
No meaningful difference exists for everyday use. Both editions share the same core and memory management. Pro adds features such as BitLocker, Hyper-V and Group Policy, which only use extra memory when you actively use them, for example while running a virtual machine.
Should I use Efficiency mode in Task Manager?
Efficiency mode lowers a process's priority so it competes less for CPU time, which can help a busy PC feel more responsive. It does not directly free RAM. Right-click a background process in Task Manager and choose Efficiency mode; avoid using it on system processes or apps you are actively working in.
Related guides
- How to perform a clean boot in Windows 11
- How to remove or disable widgets in Windows 11
- Sleep vs hibernate vs shut down in Windows 11
- Windows 11 update stuck or failed? How to fix it
- 15 common Windows 11 problems and how to fix them
Links in this guide
| Link | Type | Why it helps |
|---|---|---|
| Sleep vs hibernate vs shut down | Internal | Explains why restart clears memory more thoroughly |
| Clean boot in Windows 11 | Internal | Isolates hidden background programs using RAM |
| Remove widgets in Windows 11 | Internal | Stops a background feature loading at sign-in |
| Update drivers in Windows 11 | Internal | Fixes memory leaks caused by outdated drivers |
| Windows 11 Pro licence | Internal | Genuine Windows without risky activators |
| Office 2024 Professional Plus | Internal | Licensed Office instead of cracked installers |
| Tips to improve PC performance in Windows | External | Microsoft's official performance checklist |
| Windows background apps | External | Microsoft's steps for limiting background apps |