It starts innocently: boot-up takes a little longer. Then Chrome takes an age to open. Then you’re watching the spinning circle while trying to join a Teams call, smiling tightly at colleagues while your laptop wheezes like an asthmatic accordion. Learning how to speed up a slow Windows 11 laptop is one of the highest-value tech skills there is, because the vast majority of “dying” laptops aren’t dying at all — they’re just clogged, bloated, and badly configured. Work through these fixes in order, free ones first, and I’d wager an 80% chance your laptop feels dramatically faster by the end.

Before you start, a quick diagnostic: press Ctrl + Shift + Esc to open Task Manager, click the Performance tab, and look at what’s maxed out. CPU pinned at 100%? Memory full? Disk at 100%? That tells you where to focus — but honestly, most slow laptops benefit from all of the steps below.

Speed up slow Windows 11 laptop: the free fixes

1. Stop programs launching at startup

This is the single biggest win for slow boot times. Task Manager > Startup apps shows everything that launches with Windows — and on a typical two-year-old laptop, it’s horrifying: Spotify, Teams, Adobe updaters, manufacturer bloatware, all fighting for resources before you’ve even opened anything. Disable everything you don’t need immediately at boot. Be ruthless: you can still open Spotify manually when you want it. This alone can halve boot times.

2. Uninstall the bloat

Settings > Apps > Installed apps, sorted by size. Remove the pre-installed games, the three different photo apps, the antivirus trial that’s been nagging you since 2023, and anything with the laptop manufacturer’s name on it that you don’t recognise. Manufacturer “utilities” are almost universally useless and occasionally harmful. If you’re not sure what something is, search its name before removing — but most of it can go.

3. Check what’s eating resources right now

Task Manager > Processes, sorted by CPU or Memory. Common culprits: antivirus mid-scan (let it finish), Windows Update working in the background (check Settings > Windows Update), OneDrive syncing a huge folder, or a browser with 50 tabs. One stuck process can make the whole machine feel broken — ending it is instant relief.

4. Free up disk space

Windows gets sluggish when the drive is nearly full — it needs breathing room for temporary files and updates. Settings > System > Storage shows what’s using space; turn on Storage Sense to auto-clean temporary files. Aim to keep at least 15–20% of the drive free. If the drive is genuinely full of your stuff (photos, videos), that’s a different problem — move it to external storage rather than blaming Windows.

5. Tame visual effects

Windows 11’s transparency and animations are pretty but cost resources on older hardware. Settings > Accessibility > Visual effects — turn off transparency and animation effects. It won’t transform anything, but on a struggling machine every bit helps, and honestly the snappier feel is pleasant.

6. Update everything (yes, everything)

Windows Update, driver updates, BIOS updates from the manufacturer — performance bugs get fixed constantly. Check the laptop manufacturer’s support page for your exact model; a BIOS update alone has been known to fix thermal throttling issues that made machines crawl. While you’re at it, update your browser and main apps too.

7. Scan for malware

Sometimes “slow” is actually “infected” — cryptominers and adware are designed to be invisible while stealing your CPU. Run a full scan with Windows Security (built in, perfectly good), and if you want a second opinion, see our guide to the best free antivirus for Windows in 2026. If scans find something nasty, that’s your culprit.

8. Stop Windows restarting at the worst moments

Nothing kills momentum like Windows deciding 2am — or mid-presentation — is update o’clock. Set active hours properly so restarts happen on your schedule: our guide to stopping Windows restarting overnight walks through it.

The deeper fixes (still mostly free)

9. The nuclear option: reset Windows

If you’ve done all of the above and it’s still slow, Settings > System > Recovery > Reset PC gives you a factory-fresh Windows while optionally keeping your files. This fixes the accumulated cruft of years — broken registry entries, conflicting drivers, half-uninstalled software — that no amount of tidying touches. Back up first (always), choose “Keep my files”, and budget an afternoon. I’ve seen five-year-old laptops come back feeling new after a reset.

10. Check the thermals

A laptop that was fast and became slow is often just hot. Dust-clogged fans force the CPU to throttle itself to avoid melting. If the base gets very hot and the fans scream constantly, power it off and blow compressed air through the vents (short bursts, from the outside). For older machines, replacing the thermal paste is transformative — but that’s a job for the confident or a repair shop (£40–£60).

The hardware upgrades worth paying for

11. SSD: the miracle upgrade

If your laptop still has a spinning hard drive (check Task Manager > Performance — it’ll say HDD), stop everything and upgrade to an SSD. This single change makes a bigger difference than every software tweak combined — boot times drop from minutes to seconds, and the whole machine feels a generation newer. A 500GB SSD costs £30–£40, and cloning your existing drive across is straightforward with free software. This is the best £35 in all of computing.

12. More RAM

8GB is the realistic minimum for Windows 11 in 2026; 4GB machines will struggle whatever you do. If your laptop has a free RAM slot (check the manufacturer’s specs — many thin ultrabooks have soldered RAM that can’t be upgraded), adding another 8GB stick (£20–£30) eliminates the stuttering that comes from Windows constantly swapping to disk. Check Task Manager > Performance > Memory: if it’s regularly above 85%, you need more.

When to stop fixing and replace

Be honest with yourself: if the laptop is 6+ years old, has a dual-core processor, 4GB of soldered RAM, and a failing battery, no amount of optimisation will make it pleasant — the money is better saved toward a replacement. Our guide to how long a laptop should last helps with that call, including the repair-vs-replace maths. But for anything made in the last four or five years with decent specs, the steps above will almost certainly buy you another couple of years.

Microsoft’s support pages have official performance troubleshooting steps if you want the sanctioned version, and Which?’s laptop reviews include speed test results — useful if you do end up shopping.

The practical takeaway

Work in this order: kill startup apps, uninstall bloat, check Task Manager for resource hogs, free disk space, update everything, scan for malware — that sequence alone fixes most slow laptops in under an hour. If it’s still sluggish, reset Windows; if it has a spinning hard drive, fit an SSD (£35, transformative); if RAM is maxed, add more. Only when the hardware itself is genuinely obsolete — 6+ years, soldered everything, failing battery — is it time to shop for a replacement rather than repair.