If your Windows 11 PC feels slower than it used to, you can usually speed up Windows 11 for free in less than 30 minutes. According to Microsoft’s own performance guidance, a slow computer is almost always caused by too many startup programs, background apps eating resources, a nearly-full hard drive, or visual effects your hardware doesn’t need to render. Work through the fixes below in order, starting with the ones that make the biggest difference.
1. Disable Unnecessary Startup Programs
Too many apps launching automatically is the single most common cause of a slow PC. Press Ctrl+Shift+Esc to open Task Manager, click the Startup apps tab, and disable anything marked “High impact” that you don’t need running immediately. Common safe-to-disable culprits include OneDrive, Teams, Spotify, Discord, and various software updaters.
2. Switch to Best Performance Power Mode
Windows 11 throttles performance by default to save energy, especially on battery. Go to Settings > System > Power & Battery > Power Mode and select Best Performance when plugged in. On a laptop, keep it plugged in for demanding tasks since running on battery caps processor speed. On desktops, this single change is one of the quickest ways to speed up Windows 11.
3. Free Up Disk Space with Storage Sense
A hard drive that’s nearly full slows down almost everything, including boot time and app launches. Go to Settings > System > Storage > Storage Sense, turn it on, and click Run Storage Sense now to clear temporary files immediately. Enable automatic monthly cleanup so this keeps happening without you thinking about it.
4. Turn Off Visual Effects You Don’t Need
Windows 11’s animations and transparency effects look nice but cost real GPU and CPU cycles, especially on older hardware. Press Windows + R, type sysdm.cpl, then go to Advanced > Performance > Settings and choose Adjust for best performance, or manually keep just “Smooth edges of screen fonts” checked. Turning these extras off can noticeably speed up Windows 11 on older hardware.
5. Disable Transparency Effects
Separately from the above, go to Settings > Personalization > Colors and toggle Transparency effects off. This is a quick win that noticeably reduces GPU load on integrated-graphics laptops.
6. Limit Background Apps
Many apps keep running and consuming resources even when you’re not using them. Go to Settings > Apps > Installed apps, click the three-dot menu next to an app, choose Advanced options, and set Background apps permissions to Never for anything you don’t need updating in real time.
7. Run Disk Cleanup for System Files
Storage Sense handles routine junk, but the built-in Disk Cleanup tool can remove larger leftovers like old Windows Update files and previous installation backups. Search for “Disk Cleanup” in the Start menu, select your system drive, click Clean up system files, and check items like “Windows Update Cleanup” and “Temporary files.”
8. Turn Off Search Indexing (On Older Hardware)
Windows Search indexing makes file searches faster but constantly uses disk and CPU resources in the background. On an older HDD-based PC, disabling it can noticeably improve responsiveness, though it will make searches slower. This trade-off usually isn’t worth it if you have an SSD, since indexing has minimal impact there.
9. Scan for Malware and Bloatware
Unwanted software running silently in the background is a common, overlooked cause of slowdowns. Run a full scan with Windows Security (built into Windows 11, no download required) and remove any pre-installed “bloatware” you never use via Settings > Apps > Installed apps.
10. Update Your Device Drivers
Outdated graphics and chipset drivers can cause stuttering, especially after a major Windows update. Check Settings > Windows Update > Advanced options > Optional updates for driver updates, or download the latest drivers directly from your GPU manufacturer’s site (NVIDIA, AMD, or Intel).
11. Use Efficiency Mode for Resource-Hungry Apps
If one specific app is hogging your CPU, open Task Manager, right-click the process, and select Efficiency mode. This throttles the app’s resource usage without closing it, which is useful for background tools you want to keep open but not competing for performance. If it’s an AI writing or meeting tool doing the heavy lifting, our roundup of AI productivity tools for remote work covers lighter-weight alternatives worth trying.
12. Roll Back to a Previous Restore Point
If your PC slowed down suddenly after an update or a new install, System Restore can undo the change without affecting your personal files. Search for “Create a restore point,” click System Restore, and choose a restore point from before the slowdown started.
Which Fixes Speed Up Windows 11 the Most?
If you only have ten minutes, start with the first three fixes: disabling high-impact startup apps, switching to the Best Performance power mode and clearing space with Storage Sense. Together they target the most common reasons Windows 11 feels sluggish. If you still need to speed up Windows 11 after working through all 12 fixes, the bottleneck is probably hardware, and upgrading to an SSD or adding RAM will help more than any setting.
How to Check What Is Actually Slowing Down Your PC
Before trying every fix on this list, it helps to diagnose the actual bottleneck so you spend your time on the right one.
Check CPU, Memory, and Disk Usage
Open Task Manager (Ctrl+Shift+Esc) and click the Performance tab. Watch CPU, Memory, and Disk usage while you use your PC normally. If Memory sits near 90% or higher during normal use, more RAM (or closing background apps) will help more than any visual-effects tweak. If Disk usage spikes to 100% frequently on an older PC, an aging hard drive is likely your real bottleneck, and upgrading to an SSD will make a bigger difference than anything else on this list.
Identify the Specific Process Causing Slowdowns
In the same Task Manager window, click the Processes tab and sort by CPU or Memory to see exactly what is consuming resources. If one unfamiliar process is consistently at the top, search its name online before assuming it is safe, since this is also a common way to spot malware disguised as a system process.
Long-Term Habits That Keep Windows 11 Fast
A single cleanup session helps, but a few ongoing habits prevent the slowdown from creeping back.
- Restart weekly, not just when it crashes. Restarting clears memory leaks and resets background services that accumulate over days of continuous uptime.
- Review startup apps after every major install. New software often adds itself to startup by default; check the Startup apps tab whenever you install something new.
- Keep at least 15-20% of your drive free. Performance degrades noticeably once a drive gets too full, well before it actually hits 100%.
Frequently Asked Questions
What is the fastest way to speed up Windows 11?
The fastest way to speed up Windows 11 is to open Task Manager (Ctrl + Shift + Esc), disable high-impact startup apps, then switch the power mode to Best Performance. Both take a couple of minutes and you will usually notice the difference after the next restart.
Why did my Windows 11 PC suddenly get slow?
Sudden slowdowns are usually caused by a recent update, a new background app, a nearly-full drive, or malware. Check Task Manager’s Startup apps tab and run a malware scan first; those two steps resolve most sudden performance drops.
Does reinstalling Windows 11 actually speed things up?
Yes, but it should be a last resort. A clean install clears out accumulated startup bloat and driver conflicts, but most of the same gains can be achieved with the fixes above without losing your files and settings.
Will more RAM speed up an old Windows 11 PC?
If you’re regularly hitting 90%+ RAM usage in Task Manager, yes, adding RAM will help significantly. If usage stays well below that, the bottleneck is more likely your storage drive or startup programs.
Is it safe to disable startup apps?
Yes. Disabling a startup app only stops it from launching automatically; it doesn’t uninstall or delete anything. You can always open the app manually or re-enable it later.
Conclusion
Most Windows 11 slowdowns come down to too many programs competing for the same limited resources. To speed up Windows 11 quickly, start with disabling unnecessary startup apps and freeing up disk space with Storage Sense, since those two fixes alone resolve the majority of complaints. Work through the rest of this list as needed to speed up Windows 11 further, and you should notice a real difference without spending a cent on “PC booster” software. If your machine is still struggling after trying all 12 fixes, the hardware itself may be the bottleneck; our laptop buying guide can help you figure out what to upgrade to.