How to Make Your Laptop Faster for Free

The fastest way to speed up a slow laptop is to find the actual bottleneck first, then fix that one thing, instead of running a "cleaner" app or reinstalling Windows. Nine times out of ten the culprit is one of three things: too many programs launching at startup, a drive that's either nearly full or still a mechanical hard disk, or a browser buckling under tabs and extensions. Here's how to diagnose and fix each, in order of payoff.

First, find the real bottleneck#

Open the right monitor and watch it while the laptop struggles. On Windows, press Ctrl+Shift+Esc for Task Manager and click the Performance tab. On a Mac, open Activity Monitor (Applications > Utilities). Watch three numbers:

• CPU near 100% with one app named at the top means a single program is the problem. Close or uninstall it.
• Memory (RAM) maxed out means you're out of headroom. On a Mac, check the "Memory Pressure" graph at the bottom of the Memory tab. Yellow or red means you need more RAM or fewer open apps.
• Disk pinned at 100% constantly, especially on an older machine, almost always means a mechanical hard drive that can't keep up. That points straight at an SSD upgrade.

Knowing which of these is stuck tells you which section below to prioritize instead of guessing.

Cut what launches at startup#

The biggest cause of a sluggish laptop is the crowd of programs that launch the moment you power on, each one quietly holding RAM and CPU whether or not you use it.

On Windows 11, go to Task Manager > Startup apps. It shows a "Startup impact" rating of Low, Medium, or High next to each entry. Right-click and Disable anything rated High that you don't need instantly: Spotify, Steam, Adobe Creative Cloud, Microsoft Teams, and printer or "helper" updaters are the usual suspects. Also check Settings > Apps > Startup.

On macOS, open System Settings > General > Login Items & Extensions. Remove apps under "Open at Login," then review "Allow in the Background" below it, because many apps leave a background agent running even when the app itself is closed.

Disabling a startup entry doesn't uninstall it. You're just telling it to wait until you open it yourself. Restart afterward and you'll feel the difference on the very next boot.

Give the drive room to breathe#

A nearly full drive slows everything down, because the system needs free space for temporary files and paging. Keep at least 10 to 15 percent of the drive free. An SSD in particular needs spare blocks for wear-leveling and the TRIM command, and both SSDs and hard drives slow noticeably once they pass roughly 90 percent full.

Work through this cleanup pass:

• Windows: turn on Storage Sense (Settings > System > Storage) to auto-clear temp files, or run Disk Cleanup (search "Disk Cleanup," or run cleanmgr) and tick "Temporary files" and "Windows Update Cleanup."
• macOS: open System Settings > General > Storage and use the built-in Recommendations, including "Empty Trash Automatically."
• Empty the Recycle Bin or Trash, which often holds gigabytes.
• Sort your Downloads folder by size and delete the one-off installers you ran once.
• Move photo and video libraries to an external drive or the cloud, and check that iCloud Photos or OneDrive isn't keeping a second full local copy. Turn on "Optimize Mac Storage" or OneDrive Files On-Demand so files live in the cloud until you open them.

Update the OS, browser, and drivers#

Out-of-date software isn't just a security risk; updates routinely ship performance and driver fixes. Note that Windows 10 reached end of support on October 14, 2025, so unless you're paying for Extended Security Updates, plan a move to Windows 11 (or Linux on older hardware). Run Windows Update (Settings > Windows Update) or macOS Software Update (Settings > General > Software Update).

Update your browser too, since a current version of Chrome, Edge, or Firefox is dramatically lighter than one a year old. On Windows, grab the latest graphics driver directly from Intel, AMD, or NVIDIA rather than trusting whatever shipped in 2021.

Rein in the browser and background apps#

Most "my laptop is slow" complaints are really "my browser is slow." In Chrome and Edge, each tab is a separate process, and 30 open tabs can eat several gigabytes of RAM on their own. Both browsers have a built-in task manager (press Shift+Esc) that shows exactly which tab or extension is the hog. Sort by Memory and you'll spot the offender in seconds.

Trim extensions to the few you actually use. A reputable ad blocker like uBlock Origin genuinely speeds up browsing, but "coupon finder" extensions usually slow pages down and harvest data. Then run a scan with your built-in security tool (Microsoft Defender on Windows) to rule out malware, a classic hidden resource drain.

Heat and power: the throttling nobody checks#

Laptop CPUs deliberately slow themselves down, called thermal throttling, when they hit around 95 to 100 degrees Celsius to avoid damage. A machine that feels fast for two minutes and then crawls, fans roaring, is usually overheating. Free tools like Core Temp or HWMonitor on Windows show live CPU temperature. Use the laptop on a hard, flat surface rather than a bed or blanket that blocks the vents, and clear dust from the vents with short bursts of compressed air while holding the fan still.

While you're there, check the power mode. On Windows: Settings > System > Power & battery > Power mode, set to "Best performance" when plugged in. On a Mac: System Settings > Battery, and make sure Low Power Mode is off.

The one upgrade worth paying for#

If the software steps didn't help and Task Manager showed Disk pinned at 100 percent, your laptop still has a mechanical hard drive, and this is the upgrade that transforms it.

SSD first#

Replacing a 5,400-rpm hard disk (roughly 80 to 120 MB/s) with a solid-state drive is the single biggest real-world speed jump you can buy. A SATA SSD reads at about 550 MB/s, and an NVMe drive in an M.2 slot ranges from 2,000 to 7,000 MB/s. Boot times fall from over a minute to under 15 seconds. Not sure which you have? On Windows, open "Defragment and Optimize Drives," which labels each drive "Hard disk drive" or "Solid state drive."

Then RAM#

If Memory was the number that maxed out, add RAM. 8 GB is a workable floor for Windows 11 and light multitasking; 16 GB is the comfortable target if you keep many tabs and apps open. Use Crucial's or Kingston's free compatibility scanner to find the exact SO-DIMM module your model takes (DDR4 versus DDR5 matters and they aren't interchangeable).

The catch: not every laptop can be upgraded#

Thin ultrabooks and every Apple Silicon Mac (M1 through M4) have RAM soldered on or built into the chip as unified memory, so it cannot be changed after purchase. Many of those laptops still take a replaceable M.2 SSD, though. Search your exact model number plus "RAM upgrade" or "SSD upgrade," or check a teardown on iFixit, before buying a single part.

Common mistakes that make things worse#

• Installing a "PC cleaner" or "registry optimizer." These do little, and many are adware or outright scams. Windows' own Disk Cleanup and Storage Sense do the real work for free.
• Defragmenting an SSD. Never do this; it adds wear for no gain. Windows automatically runs TRIM instead, so leave it alone.
• Disabling antivirus for speed. Microsoft Defender is lightweight and built in. Turning it off invites the very malware that slows machines down.
• Deleting files you don't recognize in system folders. Stick to the Recycle Bin, your Downloads, and uninstalling through Settings > Apps.

FAQ#

How much free disk space should I keep?#

Aim for at least 10 to 15 percent of the drive free at all times. Past about 90 percent full, both hard drives and SSDs slow down because the system runs out of room for temporary files and the SSD can't manage its blocks efficiently.

Will more RAM fix a slow hard drive?#

No. If Task Manager shows Disk at 100 percent rather than Memory, an SSD is the fix, not RAM. Adding memory to a machine bottlenecked by a mechanical disk barely helps, because the disk is still the thing everything waits on.

Is it safe to clean the vents myself?#

Yes, with a can of compressed air and short bursts. Hold the fan blades still so they don't spin, since spinning them can generate a damaging voltage. Avoid a household vacuum (static risk), and don't open a laptop if doing so voids an active warranty.

Do I need paid optimization software?#

No. Everything here uses built-in tools plus, at most, free utilities like Core Temp for temperature or Malwarebytes' free on-demand scan. Paid "speed booster" suites rarely beat the free steps above and sometimes add the very clutter you're trying to remove.