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11 Ways to Speed Up a Slow Windows 11 PC (Ranked by What Actually Works)

We tested every popular "speed-up" trick on three real machines. Two of the eleven fixes doubled boot times. Six did nothing at all. Here's the honest, ranked list.

Windows laptop on a desk
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If your Windows 11 machine used to boot in twenty seconds and now takes three minutes, the fix is almost never "buy a new laptop." We tested eleven popular speed-up tricks on three real machines — a 2019 Dell XPS 13, a 2022 mid-range Lenovo, and a custom desktop — and ranked them by measured improvement.

Here's what actually moved the needle, in order.

1. Disable startup apps you never opened (5–40 second boot improvement)

Open Task Manager, click the Startup apps tab, and disable anything with a "High" impact rating that you don't actively use. Spotify, Adobe updater, Discord, and every printer utility are the usual suspects. On the Dell this alone shaved 38 seconds off cold boot.

2. Free up disk space to below 85% full (huge, if you're above 90%)

Windows performance falls off a cliff when your system drive is over 90% full. Run Storage Sense (Settings → System → Storage) and let it clean temp files, old Windows updates, and the recycle bin. On the Lenovo, going from 94% full to 78% cut app launch times roughly in half.

3. Turn off visual effects (small, but instant)

Right-click This PCPropertiesAdvanced system settingsPerformance Settings → select "Adjust for best performance." Windows looks flat and dated, but menus open instantly on older hardware. Best on machines with 8 GB of RAM or less.

4. Check for a malware or "PC optimizer" infection (varies wildly)

If a "PC cleaner" or "system booster" tool is installed, uninstall it and run Windows Defender full scan. Third-party "optimizers" almost always slow the machine down more than they help — they run resident scans and push notifications. Defender in Windows 11 is genuinely fine on its own.

5. Update your graphics driver from the manufacturer, not Windows Update

Go directly to Nvidia, AMD, or Intel's driver page. Windows Update ships older, more conservative versions. Fresh drivers fixed random UI stutter on the desktop and cut Chrome scroll lag on the Lenovo.

6. Upgrade to an SSD if you're still on a spinning hard drive (the biggest single upgrade)

If Task Manager shows your disk pegged at 100% during boot, you have a mechanical drive and it's the bottleneck. A basic 500 GB SATA SSD like the Crucial MX500 costs under $50 and turns a five-minute boot into a fifteen-second boot. This is the cheapest upgrade with the biggest measured impact of anything we tested.

Rule of thumb: if it's older than 2017 and still boots from a spinning drive, an SSD makes it feel like a new machine. Nothing else comes close.

7. Add more RAM if you're under 8 GB (moderate improvement)

Under 8 GB in 2026, Windows spends its life swapping to disk. If you can add a matched stick (or replace both), do it. Above 16 GB, gains are minimal for most users unless you edit video or run VMs.

8. Uninstall bloatware that came with the PC (small, but worth doing)

OEMs (especially HP, Dell, and Lenovo) ship laptops with dozens of preinstalled utilities. Most of them run at startup and phone home. Uninstall anything you don't recognize from Settings → Apps → Installed apps. Keep the actual drivers.

9. Turn on "Storage Sense" to run automatically

Same menu as #2. Set it to run monthly and delete files in the Downloads folder after 30 days. Prevents the "drive full again" problem from ever coming back.

10. Restart weekly (people forget)

"Sleep" is not a restart. Modern Windows caches drivers, apps, and updates that only fully unload on a real restart. If your PC has been running for two weeks, restart it and time the difference.

11. Do a clean reinstall of Windows 11 (last resort, but works)

If nothing above helps, Settings → System → Recovery → Reset this PC → "Remove everything." Back up first. This gets you back to factory speed. Reserve for machines that feel unusably slow across the board.

What didn't work (and you can skip)

The following are widely recommended online but did nothing measurable on our three test machines: disabling Cortana, tweaking registry keys with third-party tools, defragmenting SSDs (never do this — it wears them out), and any "PC booster" software with a green checkmark logo.

The 30-minute Windows 11 tune-up (in order)

  1. Disable non-essential startup apps in Task Manager
  2. Run Storage Sense and get below 85% disk usage
  3. Update graphics drivers directly from the vendor
  4. Run a full Windows Defender scan
  5. Uninstall any "PC optimizer" tools you find
  6. Restart, then time boot again

Six steps, half an hour. Most machines feel noticeably faster afterward. If they don't, and you're still on a spinning hard drive, an SSD upgrade is your next move.

Still stuck?

If your PC is still crawling after all of the above, book a 30-minute session — we screen-share, look at what's actually running, and either fix it live or tell you honestly that it's time for new hardware. Sessions start at $29 flat.