Windows 11 High RAM Usage? How to Fix It (10 Methods)
You open Task Manager and see 85%, 90%, even 95% RAM usage with barely anything open. High RAM usage on Windows 11 is a widespread complaint, and it usually is not one single program hogging memory — it is a dozen small things adding up: startup apps, background services, browser tabs, and Windows features you never asked for. The good news is you can reclaim a huge chunk of RAM without buying more. Here are ten methods that work, from the simplest to the more advanced.
10 methods to fix high RAM usage
1. Disable startup apps. Every program that launches when you boot up sits in RAM forever, even if you never open it. Press Ctrl+Shift+Esc to open Task Manager, go to the Startup apps tab, and you will see a list. Disable everything you do not need immediately — chat apps, Spotify, game launchers, updaters, printer utilities. Right-click each one and choose Disable. You can still open any of these apps manually when you need them; they just will not consume RAM from the moment you turn on the PC. This alone can free up 1 to 3 GB on a typical machine.
2. Turn off SysMain (formerly Superfetch). SysMain is a Windows service that preloads apps it thinks you will use into RAM, and on systems with limited RAM (8GB or less) it often backfires and causes constant high usage. Press Win+R, type services.msc, and press Enter. Find “SysMain” in the list, double-click it, set Startup type to Disabled, click Stop, then OK. If you notice apps launch slower afterward, you can re-enable it, but most users with RAM constraints see a clear improvement with it off.
3. Tame your browser tabs. Modern browsers are the biggest RAM hogs on most PCs. Each open tab in Chrome or Edge can consume 100–300 MB, and twenty tabs means 4–6 GB gone. Use a tab suspender extension like Auto Tab Discard or The Great Suspender to unload idle tabs from memory after a few minutes. Better yet, switch to a memory-efficient browser like Firefox or Edge with sleeping tabs enabled. Close tabs you are not actively using — your RAM will thank you.
4. Scan for malware. Viruses, crypto miners, and adware love to hide in background processes and eat RAM and CPU. Run a full scan with Windows Security (Virus & threat protection > Scan options > Full scan) or a free tool like Malwarebytes. If you find something, remove it and reboot — unexplained high RAM usage that came on suddenly is very often malware.
5. Adjust virtual memory (pagefile). Windows uses a portion of your hard drive as “virtual memory” when RAM fills up. If the pagefile is too small or misconfigured, it can cause performance issues and make RAM usage appear worse. Press Win+R, type sysdm.cpl, go to Advanced tab > Performance Settings > Advanced > Virtual memory Change. Uncheck “Automatically manage paging file size,” select your drive, choose “System managed size,” click Set, then OK. Reboot. Letting Windows manage the pagefile size is almost always the right setting.
6. Run the RAM diagnostic tool. Sometimes high usage and crashes are caused by faulty RAM, not software. Windows has a built-in memory tester. Press Win+R, type mdsched.exe, choose “Restart now and check for problems.” Your PC will reboot and run a memory test (it takes 10–20 minutes). If it reports errors, one of your RAM sticks may be failing and needs replacement. Even if it passes, reseating the RAM sticks (removing and reinserting them) can fix flaky memory issues.
7. Update or roll back problematic drivers. Buggy drivers — especially graphics, network, and chipset drivers — can cause memory leaks where RAM usage keeps climbing until you reboot. Update your GPU driver from NVIDIA/AMD/Intel directly (not just Windows Update), and check your motherboard or laptop manufacturer’s site for chipset and network driver updates. If high RAM usage started right after a driver update, roll that driver back in Device Manager. A memory leak from a bad driver is one of the hardest problems to spot but one of the most satisfying to fix.
8. Turn off Memory Integrity (Core Isolation). Memory Integrity is a security feature in Windows 11 that can consume significant RAM and cause performance overhead, especially on older CPUs without proper virtualization support. Go to Settings > Privacy & security > Windows Security > Device security > Core isolation details, and toggle off “Memory Integrity.” Reboot. Note: this slightly reduces security against certain types of malware, so weigh the trade-off. If you have 16GB+ RAM and a modern CPU, you can probably leave it on; if you are on 8GB and struggling, turning it off often frees up a meaningful amount of memory.
9. Repair or reset Windows. If nothing else works, Windows system files may be corrupted. First, try an in-place repair: open Command Prompt as administrator and run sfc /scannow followed by DISM /Online /Cleanup-Image /RestoreHealth. These scan and repair corrupted system files. If the problem persists, go to Settings > System > Recovery > Reset this PC and choose “Keep my files” — this reinstalls Windows while preserving your documents and apps (though you should back up first). A reset almost always resolves software-caused high RAM usage.
10. Know when to just upgrade your RAM. If you have tried everything and still sit at 90%+ with normal use, you may simply need more memory. Windows 11 alone comfortably uses 3–4 GB at idle, and with a browser, a few apps, and background services, 8 GB is the bare minimum in 2026. For comfortable multitasking, 16 GB is the sweet spot, and content creators or gamers should aim for 32 GB. Check Task Manager > Performance > Memory to see how many RAM slots you have and what speed you need — upgrading RAM is one of the cheapest, most effective performance upgrades you can make.
Frequently asked questions
Is high RAM usage always bad? Not necessarily. Windows is designed to use available RAM for caching (that is the whole point of SysMain and the file cache). RAM that is “standing by” or cached is still available if an app needs it. The real problem is when RAM usage is so high that Windows is forced to constantly swap to the pagefile on disk — that is when you get lag, freezes, and slow app launches. If your PC feels fast, do not worry about the percentage.
How much RAM does Windows 11 actually need? Officially the minimum is 4 GB, but that is unusable in practice. 8 GB is the practical minimum for basic web browsing and office work. 16 GB is comfortable for most people. 32 GB+ is for gaming, video editing, virtual machines, and heavy multitasking.
Will closing apps in Task Manager help? Temporarily, yes — but if they are startup apps or background services, they will come back. The permanent fix is disabling them at startup (method 1) or uninstalling apps you do not use. Do not end system processes like explorer.exe or svchost.exe — that can crash Windows.
Why does RAM usage keep going up over time? A memory leak — a bug in a program or driver that grabs RAM and never releases it — is the usual cause. The leaky process will show up in Task Manager sorted by memory. Restarting your PC clears it temporarily, but the permanent fix is updating or uninstalling the offending program.