Your laptop used to boot in 20 seconds. Now it takes three minutes, and opening Slack feels like waiting for paint to dry. You're not alone—and you probably don't need a new machine.
I've spent the last five years watching people buy new laptops when a $0 afternoon of maintenance would've fixed the problem. How to speed up a slow laptop comes down to a handful of concrete actions: kill the bloat, fix your storage, and stop letting Windows (or macOS) run a thousand background tasks you didn't ask for.
Let's walk through the fixes that actually move the needle.
Check Your Storage First
A laptop running at 90% disk capacity will feel slow even if the CPU is fine. Windows and macOS both reserve space for temporary files, updates, and system operations—when you're out of room, everything grinds.
Open Settings → System → Storage on Windows, or Apple menu → About This Mac → Storage on Mac. If you're above 85% full, you've found your culprit.
The fix:
- Delete old downloads folder (most people have 5GB of installers from 2021)
- Uninstall programs you haven't opened in six months (Settings → Apps on Windows; Applications folder on Mac)
- Move large files (videos, photo libraries) to external drive or cloud storage
- Clear browser cache (Settings → Privacy in Chrome; Safari Preferences → Privacy)
If you're still tight on space, run Disk Cleanup on Windows (search "Disk Cleanup" in Start menu) or use CleanMyMac X ($40 one-time) on Mac. I'd skip the free "cleaner" apps—they're often bundled with adware.
Target: get to 70% capacity or lower. You'll notice the difference immediately.
Disable Startup Programs
Every app you've installed is fighting to launch when your computer starts. Slack, Teams, Discord, Spotify, Adobe Creative Cloud—they all want to run in the background from boot.
On Windows:
- Right-click taskbar → Task Manager
- Click "Startup" tab
- Right-click anything you don't need running immediately → Disable
You probably don't need Spotify starting at boot. You definitely don't need Adobe's Creative Cloud Helper launching before you've even opened your browser.
On Mac:
- System Settings → General → Login Items
- Remove anything you don't actively use
I keep only my VPN and Dropbox enabled. Everything else I launch manually when I need it. This alone can cut boot time in half.
Update Your Operating System and Drivers
This one's boring, but it matters. Windows and macOS push performance updates regularly. If you've been ignoring those "restart to install updates" notifications, you're running on outdated code.
On Windows:
- Settings → Update & Security → Check for updates
- Let it install, restart, and run again (sometimes multiple rounds)
On Mac:
- System Settings → General → Software Update
- Install and restart
While you're at it, update your GPU drivers if you're on Windows. NVIDIA and AMD push performance improvements constantly. Go to their websites directly—don't rely on Windows Update.
Kill Background Bloat
Windows loves running things you didn't ask for. Open Task Manager (Ctrl+Shift+Esc) and click the Performance tab. What's eating your CPU and RAM?
Common culprits:
- Windows Search indexing (eats 20-30% CPU for hours after startup): Disable it in Services (services.msc) if you don't use the search box
- OneDrive sync (constantly uploading/downloading): Pause it in system tray if you don't actively use it
- Antivirus running full scans: Reschedule scans to run at night
- Windows Update: Often runs in background. Check Settings → Update & Security → View update history
On Mac, open Activity Monitor (Applications → Utilities) and sort by CPU. Look for processes using >10% consistently. If it's something you don't recognize, Google it before killing it—some system processes look suspicious but aren't.
Increase Virtual Memory (Windows) or Reduce Memory Pressure (Mac)
If you're running out of RAM (watch Task Manager or Activity Monitor), your laptop swaps data to disk, which is 100x slower than actual memory.
On Windows, you can increase virtual memory:
- Right-click This PC → Properties → Advanced system settings
- Performance → Settings → Advanced tab
- Virtual Memory → Change
- Set to 1.5x your installed RAM
This is a band-aid, not a cure. If you're regularly hitting 90% RAM usage, you need more RAM (or fewer Chrome tabs).
On Mac, memory pressure appears in Activity Monitor → Memory tab. If it's consistently in the yellow or red, close background apps or upgrade RAM.
Check for Malware and Bloatware
Slow laptops often have unwanted passengers. Malware, potentially unwanted programs (PUPs), and aggressive adware can tank performance.
On Windows:
- Run Windows Defender (built-in): Settings → Update & Security → Virus & threat protection → Scan
- If you suspect something worse, download Malwarebytes (free version is fine) and run a full scan
On Mac:
- Malwarebytes for Mac (free) is worth running
- Also check System Settings → General → Login Items and Extensions for anything suspicious
If you've been downloading from sketchy sites or clicking "Download" on ad-heavy pages, you probably have something unwanted. A full Malwarebytes scan takes 30 minutes but can reclaim gigabytes of performance.
Consider a Fresh OS Install (Last Resort)
If you've done all the above and your laptop still crawls, a clean OS install is the nuclear option. It wipes everything and reinstalls Windows or macOS from scratch.
This fixes deeply embedded bloat, corrupted system files, and accumulated cruft that can't be cleaned any other way. I do this every 18-24 months on my work laptop. The same principle applies when choosing web hosting—sometimes starting fresh beats patching a slow foundation, which is why shared vs managed WordPress hosting is such a common debate among site owners who've hit a performance wall.
Before you do it:
- Back up everything (external drive or cloud)
- Write down your software licenses and passwords
- Allocate 2-3 hours
On Windows: Settings → System → Recovery → Reset this PC. On Mac: restart, hold Cmd+R, reinstall macOS from Recovery.
After reinstalling, don't restore from a backup—manually reinstall only what you need. This is the difference between a laptop that feels new again and one that's still slow.
The One Thing That Matters Most
If you do nothing else: free up disk space and disable startup programs. Those two actions fix 80% of slow laptop complaints and cost nothing.
Do both today. Restart. Measure the difference. If your laptop's still sluggish after that, work through the other steps. But I'd bet you'll be surprised how much faster it feels.
The goal isn't to turn a five-year-old laptop into a new one—it's to stop letting Windows or macOS work against you. Most slowness isn't hardware failure. It's just bloat you can remove in an afternoon. If you're also managing a website and notice similar sluggishness there, the comparison on wpcompass.io on what actually moves the needle for WordPress speed is worth a read.