Best free PC optimizer: the free tools worth installing, and when to stop

Free is often the complete answer

We sell a paid optimizer, and we will still say this plainly: for a large share of gaming PCs, free tools and a few minutes in Windows Settings are everything that is needed. The changes with the clearest effect on games are not secret and not locked behind software. They are a current graphics driver, sensible power settings, background recording switched off if you never use it, and fewer programs competing with the game.

Where free stops being enough is not frame rate. It is convenience: having every change in one place, knowing exactly what was altered, and being able to reverse any single change later. Whether that is worth paying for is a personal judgement, and this page tries to give you what you need to make it rather than make it for you.

The free optimizer that is already installed

Before downloading anything, Windows itself covers more than most people use:

• Game Mode, under Settings, Gaming, keeps Windows Update from installing drivers and prompting restarts while you play. It is on by default; check it has not been switched off.
• Startup apps, under Settings, Apps, Startup, lists what launches when you sign in, with an impact rating in Task Manager's version of the same list.
• Graphics settings, under Settings, System, Display, Graphics, let you choose which graphics processor each game uses and, on Windows 11, turn on optimizations for windowed games.
• Power settings let you choose a plan or, on Windows 11, a power mode, which decides how eagerly the processor runs at full speed.
• Capture settings in the Xbox Game Bar control whether footage is recorded continuously in the background.
• Storage Sense clears temporary files automatically on a schedule you set.

Doing these by hand costs nothing and teaches you what each change does, which pays off later whichever tools you add. The registry-level detail behind several of them is documented on the complete list of JINSHI tweaks, which is free to read and useful without the product.

Free tools, matched to the job each does best

For drivers and per-game graphics: the NVIDIA app or AMD Software

Your graphics card maker's own software is the right home for driver updates and per-game graphics options, because it comes from the people who write the driver. No third-party optimizer should be managing drivers for you.

For seeing what is really happening: MSI Afterburner with RivaTuner

Afterburner, with the RivaTuner Statistics Server it installs alongside, gives you an on-screen display of frame rate, frame time, temperatures and usage while you play. It is the best free way to find out whether a problem is the processor, the graphics card or heat before changing anything at all, and it is useful even if you never overclock.

For basic cleanup with no third-party risk: Microsoft PC Manager

Microsoft's own tool clears storage and manages startup through features Windows already has. It will not tune a gaming PC, but as a first cleanup step it adds nothing from an outside vendor.

For pausing background apps at launch: Razer Cortex

Free and game-oriented, Cortex suspends background processes while a game runs and brings them back afterwards. It is most useful on a PC that routinely has a lot open, and least useful on one that is already quiet.

For a fresh install and readable changes: Chris Titus Tech WinUtil

WinUtil is open source, so every tweak can be read before it runs. It is at its best on a new Windows install, where removing preinstalled software and applying a set of settings in one go saves real time. Tick its restore point option first, because it is off by default.

For customising Windows itself: Winaero Tweaker

A large, free collection of interface and behaviour settings. It suits people who want the desktop to behave their way more than people chasing smoother games.

For disk space: CCleaner Free

The free edition is a capable way to find reclaimable space. Leave its registry cleaner alone, and be aware that the paid editions it promotes are renewing subscriptions.

A free optimization routine, in a sensible order

Order matters more than most guides admit, because each step changes what the next one measures. This sequence uses only Windows and free software:

1. Update the graphics driver from your card maker's own app or website, then restart.
2. Clear space if the system drive is nearly full, using Storage Sense or PC Manager, and leave any registry cleaner unused.
3. Trim startup apps down to the ones you genuinely want running from the moment you sign in.
4. Check that Game Mode is on and background recording is off, unless you actually use instant replays.
5. Confirm each game uses the right graphics processor, which matters most on laptops with two.
6. Choose a power setting on purpose, keeping heat in mind if you play on a laptop.
7. Play a match with an on-screen display running to see whether the processor, the graphics card or temperature is now the limit.

Stop there if games feel right. Every step can be reversed through the same menu you used to make it, which is the free route's biggest advantage over a folder of downloaded tweaks.

Free downloads worth avoiding

Free does not always mean harmless. A few kinds of download are best left alone:

• "Game boosters" from unknown publishers that ask you to disable antivirus during installation.
• Registry packs shared as .reg files on forums, which apply many changes at once with no record and no way back.
• Driver updaters that scan for free and charge to fix what they find.
• Installers that bundle other software, especially browser extensions or search engine changers.

A free tool that will not tell you what it changes is not really free, because you pay later in the time it takes to find out. Plenty of circulating registry tweaks also turn out to do nothing, which our teardown of popular registry tweaks documents value by value.

Where free tools genuinely run out

The limits of the free route are real, and none of them is about raw performance:

• No single record. Changes made across Settings, two or three tools and a registry editor leave no one place that says what was altered, which makes a problem six months later hard to trace.
• Undo is scattered. Each tool reverses its own changes in its own way, if at all, and manual changes are reversed only if you noted the original value.
• Protection is up to you. Few free tools create a restore point automatically, so remembering to make one is your job.
• Reading is the price of open source. Open code is only reassuring if someone reads it; running a script you have not read is trust, not verification.
• Some free editions sell. Freemium tools earn money by promoting upgrades, which shapes what the free edition shows you.

A quick test: is free enough for you?

Free is very likely enough if most of these are true:

• You are comfortable finding a setting in Windows by following written directions.
• You only want to change a handful of things, not dozens.
• You will keep a note of what you changed and what it was before.
• You would rather spend time than money on this.

Paying starts to make sense when the opposite holds: you want many changes applied together, documented without your own notes, and reversible one at a time without remembering original values. Free vs paid PC optimizers examines that decision on its own, and the tweaking app comparison puts the free tools and ours through the same four tests.

The paid option we sell, for contrast

JINSHI Tweaks is ours, and it is not free: there is no free tier or trial, only a one-time purchase with a refund if it will not run on your PC. Its main app, PC Tweaks, applies 122 Windows changes that you could make by hand, publishes each one, and reverses each individually. PC Tweaks does not create a restore point for you; the bundle's Network Optimizer asks Windows for one before its first change. Everything it does can be done for free with the tools and settings above; what it sells is doing it in one place with a record and an undo for every change. If that is worth it to you, the JINSHI Tweaks homepage has the details.

For how gaming tools differ from the cleaners in this list, see the best PC optimizer for gaming, and for a checklist that works whichever tools you use, how to choose a PC optimizer.