PCMag UK just published a roundup of 16 practical fixes for a sluggish Windows 11 PC, and while the list covers everything from uninstalling bloatware to upgrading your RAM, the real lesson is that order matters. Blindly applying every trick won't necessarily speed up your machine—you need to identify the bottleneck first.

The PCMag Guide at a Glance

Published on July 22, 2026, the guide promises 14 easy fixes but actually delivers 16, with a bonus section for gamers. The recommendations range from quick software tweaks—disabling startup programs, running Storage Sense, toggling the power mode—to hardware upgrades like adding RAM or swapping in an SSD. It also warns against common pitfalls: overheating, outdated drivers, and unchecked malware. The full list includes:

  1. Uninstall bloatware and unused apps
  2. Limit startup processes
  3. Clean up your disk with Storage Sense
  4. Check for viruses and spyware
  5. Change the power mode to "Best Performance"
  6. Find and fix misbehaving processes via Task Manager
  7. Keep Windows up to date
  8. Run built‑in troubleshooters
  9. Install and run Microsoft PC Manager
  10. Add more RAM (if your PC allows)
  11. Install an SSD as your startup drive
  12. Adjust visual effects for performance
  13. Keep your PC physically cool
  14. Turn off search indexing (or reduce its scope)
  15. Disable tips and notifications
  16. (Gamers) Enable Game Mode and optimize windowed‑game settings

But reading the list is one thing—knowing where to start is another. The most effective approach, drawn from both the PCMag article and years of real‑world troubleshooting, is to diagnose first, then act methodically.

Step Zero: Diagnose Before You Treat

"My computer is slow" isn't a diagnosis; it's a symptom. Open Task Manager (Ctrl+Shift+Esc) and look at the Processes and Performance tabs after a fresh restart. If CPU usage hovers near 100%, a runaway app or update is likely the culprit. If memory usage stays above 80‑90% during normal work, you're low on RAM. A disk pegged at 100% active time points to paging, indexing, or a failing drive. High GPU usage outside of gaming might mean browser acceleration issues or recording overlays. Normal utilization combined with poor responsiveness could signal driver conflicts, thermal throttling, or firmware problems.

Establish a baseline. Restart, let all startup processes settle for a few minutes, then record your resource usage. After each change you make, compare numbers. Change one thing at a time, restart if necessary, and revert if there's no measurable improvement. This methodical approach prevents the "shotgun debugging" that often breaks Windows features or creates new troubleshooting headaches.

Software Fixes That Deliver the Most Bang for Your Buck

1. Cut unnecessary startup programs

Head to Task Manager's Startup tab. Disable any app you don't need running the moment you log in—music launchers, chat clients you open manually, printer status monitors. Windows even shows a "Startup impact" rating. A few clicks here often shaves seconds off sign‑in time and reduces background memory pressure.

2. Uninstall junkware (carefully)

Sort installed apps by publisher, installation date, or size. Remove expired trials, toolbars, and promotional software. But don't blindly delete everything with your PC manufacturer's name: some packages control function keys, battery charging, or fan profiles. If in doubt, research the program before uninstalling.

3. Enable Storage Sense

Let Windows automatically clear temporary files and manage Recycle Bin retention. Under Settings > System > Storage > Storage Sense, you can set cleanup rules. Just be cautious with the "Delete files in my Downloads folder" option—many users treat Downloads as permanent storage.

4. Run a security scan

Microsoft Defender is sufficient for most home users. Open Windows Security, update threat definitions, and run a full scan. If you prefer third‑party software, stick to one real‑time antivirus—running multiple can cripple performance and cause instability.

5. Switch to "Balanced" power mode—but consider "Best Performance" selectively

Modern processors boost on demand under Balanced mode. Best Performance forces higher clocks and can increase heat and fan noise, especially on laptops. Use it only when plugged in and when a demanding task is bottlenecked by power policy.

When Hardware Upgrades Make Sense

Software tweaks have limits. If Task Manager consistently shows memory exhaustion or your boot drive is a mechanical hard disk, no setting change will match a physical upgrade.

  • SSD first. Replacing a spinning hard drive with an internal SSD is the single most transformative upgrade. Boot times, application launches, and general snappiness improve dramatically. An external SSD connected via USB 3.0 or Thunderbolt can help with game storage or large media, but it won't accelerate Windows itself like an internal replacement.
  • RAM next. If your workloads regularly push memory usage above 80%, adding RAM—typically moving from 8GB to 16GB—can make multitasking smooth again. Check whether your laptop has upgradeable slots; many thin models have soldered memory.
  • Cooling. Dust, blocked vents, or dried thermal paste can cause processors to throttle. Cleaning fans and ensuring good airflow might restore lost performance without spending any money.

Before buying anything, confirm your PC's upgradeability, back up your data, and have your BitLocker recovery key handy.

Settings to Approach with Caution

Not every tip on the list is right for every system. Some can do more harm than good if applied indiscriminately.

  • Search indexing. Turning it off makes File Explorer and Outlook searches painfully slow. Instead, use the classic index mode and exclude folders you rarely search, like development builds or large archives.
  • Visual effects. The "Adjust for best performance" option removes all animations and shadows, but it also disables font smoothing and thumbnail previews. A better compromise is to uncheck only the most taxing effects (animations, fading) and keep usability features.
  • Microsoft PC Manager. This utility provides a convenient dashboard for cleanup and startup management, but its "boost" button simply empties the RAM cache. Windows uses free RAM intelligently to speed up future operations; forcibly clearing it may force apps to reload data, actually slowing you down.
  • Third‑party debloating scripts. Aggressive scripts that rip out system components can break updates, security features, and the Microsoft Store. Stick to removing apps you recognize and don't need.

For Gamers: A Separate Checklist

The PCMag guide wisely separates gaming settings. Game Mode is on by default for most titles; it suppresses notifications and background updates. If you're chasing a competitive edge, test it with and without—results vary by hardware. Additional moves that often help:

  • Confirm your monitor is running at its native refresh rate.
  • Install stable, not necessarily the newest, graphics drivers.
  • Disable unnecessary overlays (GeForce Experience, Discord overlay, etc.).
  • Ensure Windows' "Optimizations for windowed games" is enabled for compatible titles (found under Graphics Settings).
  • Keep shader caches on an SSD and manage thermal throttling by maintaining airflow and using the correct power adapter.

Your Weekly Maintenance Checklist

A slow PC rarely happens overnight. Adopt these habits to keep performance steady:

  • Let Windows Update run during off‑hours and reboot promptly.
  • Review startup programs every few months as new apps install silent launchers.
  • Run Storage Sense or manually delete old installer files, temporary caches, and previous Windows installations (after the rollback period).
  • Check Task Manager for any process consuming abnormal resources.
  • Keep your device physically clean—dust vents every few months with compressed air (when powered down).

What to Do Right Now

  1. Identify your bottleneck: Open Task Manager and note CPU, memory, disk, and GPU usage after a fresh restart.
  2. Disable obvious startup offenders: Go to Task Manager > Startup and disable unnecessary apps.
  3. Uninstall junk: Remove software you haven't used in months, expired trials, and unwanted OEM extras.
  4. Run a full virus scan: Use Microsoft Defender or a reputable alternative.
  5. Update Windows and drivers: Install pending patches, then let the system finish post‑update maintenance.

If performance still doesn't improve, consider a hardware upgrade—but only after confirming that the component you're replacing is actually the bottleneck.

Outlook

Windows 11 optimization isn't just about today's lag. With Windows 10 support ending on October 14, 2025—and Extended Security Updates only a temporary bridge through October 2026—many users are migrating to Windows 11. Ensuring your current PC runs smoothly prepares you for that transition. Microsoft's own tools, like PC Manager, hint at a future where maintenance is more centralized, but until then, a careful, diagnostic‑first approach remains your best defense against slowdowns.

Remember: a fast PC isn't the one with the fewest processes or the emptiest memory graph. It's the one that lets you do your work—quickly, reliably, and without losing essential features.