How to Speed Up a Slow Windows 11 PC: 10 Easy Fixes That Actually Work

There are few things more frustrating than a laptop that takes ages to open a browser, or a desktop that freezes in the middle of a Zoom call. The good news is you very rarely need to buy a new machine to fix this. Most slow Windows 11 PCs can be brought back to life in under an hour, using only built-in tools and a bit of tidying up.

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This guide walks through ten fixes in order of impact. Start from the top and work down. You will usually feel a clear difference after the first three or four, and by the time you reach the end, your machine should feel noticeably sharper.

1. Restart Your PC Properly

It sounds too simple to matter, but restarting is still the single most effective fix for a sluggish computer. Not putting the lid down, not choosing sleep, but a full Restart from the Start menu. This clears background processes, memory leaks and stuck updates that quietly slow everything down.

If you typically keep your laptop running for days at a time, make a habit of restarting at least once a week. It is the digital equivalent of stretching after sitting too long.

2. Close Unnecessary Startup Programs

Windows 11 often lets a long list of apps launch the moment you turn on your PC. This is one of the biggest reasons older machines feel slow at startup. Right-click the Taskbar, open Task Manager, and click the Startup apps tab.

Look down the list and disable anything you do not need right away. Spotify, Steam, Zoom and chat apps are common culprits. You can still open them manually when needed. This change alone can shave thirty seconds or more off boot time on a tired laptop.

3. Free Up Disk Space

A full or nearly full drive dramatically slows Windows 11 down. Open Settings, then System, then Storage. Turn on Storage Sense, which automatically clears temporary files and empties the Recycle Bin for you. Then click Cleanup recommendations and let Windows suggest big files you could safely remove.

Aim to keep at least 20 percent of your drive free. If you are tight on space, move photos and videos to an external drive or a free cloud account like OneDrive or Google Drive.

4. Uninstall Apps You No Longer Use

Open Settings, then Apps, then Installed apps. Sort by size and look for anything you have not touched in months. Old games, trial software and bloatware that came with the laptop all take up space and often run background services.

Be a bit cautious here. If you are not sure what something is, do a quick Google search before removing it. For safety, avoid anything labelled with the manufacturer name like Dell, HP or Lenovo, unless you are confident it is bloatware.

5. Run Windows Update

Older builds of Windows 11 had genuine performance bugs that newer updates have fixed. Open Settings, then Windows Update, and install anything pending. While you are there, check for optional driver updates too, especially for graphics and storage.

Restart after updates finish. Sometimes a big patch only fully takes effect after one more restart, so be patient.

6. Adjust Visual Effects

Windows 11 looks lovely, but all those animations cost processing power. On older machines, switching them off can make the whole system feel snappier. Press the Windows key, search for Adjust the appearance and performance of Windows, and open it.

Choose Adjust for best performance, or untick the animations one by one until you find a balance you like. The difference on a five-year-old laptop can be surprisingly big.

7. Check for Malware

A sudden, unexplained slowdown is sometimes a sign of malware. Windows 11 includes a decent free antivirus called Microsoft Defender. Open Windows Security, go to Virus & threat protection, and run a full scan.

If you want a second opinion, Malwarebytes Free is a trusted option that works alongside Defender without conflicting. Run it once a month and you should stay safe for most everyday browsing.

8. Reduce Background Apps

Many modern apps keep running in the background even when you close their windows. Open Settings, then Apps, and click on individual apps to see their background permissions. Turn them off for anything that does not need to send you notifications or sync data constantly.

This single setting can dramatically improve battery life on laptops and free up memory for the tasks you actually care about.

9. Upgrade to an SSD If You Have Not Already

If your PC is more than five years old and still using a traditional spinning hard drive, this is the single biggest upgrade you can make. Swapping an old HDD for an SSD usually costs less than £50 and makes even an old machine feel brand new.

Most laptops and desktops from the last decade support this upgrade. If you are not confident doing it yourself, a local repair shop can clone your drive and install the new one for a small fee.

10. Consider Adding More RAM

If you routinely have ten browser tabs, Word, Spotify and a PDF all open, and your PC still struggles, you might simply be running out of memory. Most laptops can be upgraded from 8GB to 16GB cheaply, and it makes a huge difference for multitasking.

Check your exact model on the manufacturer’s website to see whether RAM is user-upgradable. Some slim laptops have it soldered in, but many business machines are still friendly to upgrades.

Final Thoughts

A slow Windows 11 PC is almost never beyond saving. Tidy up your startup list, clear some disk space, run updates, and you are most of the way there. For older machines, a quick SSD upgrade is genuinely life-changing, and far cheaper than a new laptop. Work through this list once every few months and you will keep even a modest computer feeling quick for years to come.