Quick Answer
To speed up Windows 11: disable unnecessary startup apps (Task Manager > Startup apps), uninstall programs you never use, turn on Storage Sense, switch to Best Performance power mode, reduce visual effects, keep Windows and drivers updated, run Disk Cleanup, limit background apps, and scan for malware. These free tweaks can make an old laptop feel new again — no reinstall needed.
Introduction
Few things are more frustrating than a slow computer. You click something, wait, wait some more — and by the time it responds, you have forgotten what you wanted to do.
The good news: most Windows 11 slowdowns are caused by software clutter, not broken hardware. That means you can fix them yourself, for free, in under an hour. Here are 12 proven tips, ordered from easiest to most advanced. Start at the top and work down until your PC feels fast again.
1. Disable Unnecessary Startup Apps
Many programs sneak themselves into your startup list, so they all launch when Windows boots — slowing everything down.
How to do it: Press Ctrl + Shift + Esc to open Task Manager, click “Startup apps,” and disable everything you do not need immediately at boot (like Spotify, Discord, or update helpers). Keep your antivirus enabled.
Impact: High. This alone can cut boot time dramatically.
2. Uninstall Programs You Never Use
Old games, trial software, and apps you installed once and forgot still take up space and sometimes run background services.
How to do it: Go to Settings > Apps > Installed apps, sort by size or last used, and uninstall what you do not need.
Impact: Medium to high — frees disk space and removes background processes.
3. Turn On Storage Sense
Windows 11 can automatically clean temporary files and empty your recycle bin on a schedule.
How to do it: Settings > System > Storage > turn on Storage Sense, then click it to configure how often it runs.
Impact: Medium. Prevents the slow creep of junk files.
4. Switch to Best Performance Power Mode
Laptops often ship in “Balanced” or “Best power efficiency” mode, which limits your CPU to save battery.
How to do it: Settings > System > Power & battery > Power mode > choose “Best performance” (when plugged in).
Impact: Medium to high, especially on laptops.
5. Reduce Visual Effects
Windows 11’s animations and transparency look nice but cost performance on older machines.
How to do it: Search for “Adjust the appearance and performance of Windows,” select “Adjust for best performance,” then re-enable “Smooth edges of screen fonts” so text still looks good.
Impact: Medium. Noticeable on PCs with weak graphics.
6. Keep Windows and Drivers Updated
Updates do not just add features — they fix performance bugs and security holes.
How to do it: Settings > Windows Update > Check for updates. Also update your graphics driver from NVIDIA, AMD, or Intel’s website.
Impact: Medium. Occasionally transformative after a big update.
7. Run Disk Cleanup
Temporary files, old update leftovers, and cached data pile up over time.
How to do it: Search for “Disk Cleanup,” select your C: drive, check the boxes (especially “Temporary files” and “Windows Update Cleanup”), and click OK.
Impact: Low to medium — but it can free tens of gigabytes.
8. Limit Background Apps
Apps running in the background consume RAM and CPU even when you are not using them.
How to do it: Settings > Apps > Installed apps > click the three dots on an app > Advanced options > set “Background apps permissions” to “Never” for apps you do not need running.
Impact: Medium, particularly on PCs with 8 GB RAM or less.
9. Scan for Malware
Malware and sneaky “potentially unwanted programs” are a classic cause of mysterious slowdowns.
How to do it: Open Windows Security > Virus & threat protection > Scan options > Full scan. It is free and built in — you do not need third-party antivirus.
Impact: High if infection is present; good hygiene regardless.
10. Disable Search Indexing (Optional)
Windows constantly indexes your files for faster search, which can hammer slower hard drives.
How to do it: Only do this if you have an old HDD (not an SSD). Search “Indexing Options” > Modify > uncheck locations you rarely search.
Impact: Medium on HDDs; skip this on SSDs.
11. Consider a Hardware Upgrade
If software tweaks are not enough, two upgrades give the biggest speed boost per dollar:
- SSD: Moving from a hard drive to an SSD is the single biggest upgrade you can make. Boot times drop from minutes to seconds.
- RAM: If you have 4 GB, upgrading to 8 GB or 16 GB makes multitasking dramatically smoother.
Impact: Very high — often better than buying a new PC.
12. Reset Windows as a Last Resort
If nothing else works, a fresh start fixes almost everything.
How to do it: Settings > System > Recovery > “Reset this PC.” Choose “Keep my files” to reinstall Windows while preserving your documents.
Impact: Very high. Back up important files first, just in case.
What NOT to Do
- Do not install “PC optimizer” or “RAM booster” apps. Most are useless at best and malware at worst. Windows already includes the tools you need.
- Do not disable Windows Security or the firewall to gain speed. The risk is not worth it.
- Do not mess with the registry unless you know exactly what you are doing. One wrong edit can break your system.
Frequently Asked Questions
Why is my Windows 11 suddenly slow?
The most common causes are too many startup programs, a nearly full hard drive, pending updates, or malware. Work through tips 1–9 above and you will usually find the culprit.
Will these tips work on Windows 10 too?
Mostly, yes. The menus look slightly different, but startup management, disk cleanup, and power settings all exist in Windows 10.
How much free disk space should I keep?
Aim to keep at least 15–20% of your system drive free. Windows needs breathing room for updates, virtual memory, and temporary files.
Is it safe to disable all startup apps?
Almost. Keep your antivirus and any hardware utilities (like audio drivers) enabled. Everything else — chat apps, game launchers, updaters — can safely be disabled from startup; you can still open them manually.
Do I need to reinstall Windows every year?
No. With the maintenance tips above, a Windows 11 install can stay fast for years. Reinstall only as a last resort.
Key Takeaways
- Startup apps and background programs cause most slowdowns — tame them first.
- Storage Sense, Disk Cleanup, and regular updates prevent gradual decay.
- Skip sketchy “optimizer” apps; Windows’ built-in tools are all you need.
- An SSD upgrade beats any software tweak if your PC still uses a hard drive.
Conclusion
A slow PC does not have to mean a new PC. The twelve tips above resolve the vast majority of Windows 11 performance problems, and most take only a few minutes each. Start with the easy wins — startup apps and power mode — and enjoy a computer that feels new again.